Doors Expert Witnesses

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Doors expert witness candidates typically have a background in mechanical or automotive engineering. An expert witness carries the responsibility of providing testimony before the court in a manner whereby a judge and jury can understand the technology and evidence. In a high-profile case, or litigation involving a significant financial stake, an attorney may require an expert with prior expert testimony experience.

Matters requiring a door expert witness often involve patent infringement litigation or trade secret disputes. An expert in doors and door technology could also be called in on a product liability case, construction defect claim, or to assist in a personal injury case. Expert witness services could include expert report preparation, expert opinion, deposition, and/or courtroom testimony. Counsel may also seek an industry expert for pre-litigation consulting work.

Cahn Litigation Services has a vast network of experts and is regularly called upon by law firms to locate experts to support either a plaintiff or defendant. Whether the case involves:

• a garage door,
• automatic door systems (sensor or switch),
• a door injury case,
• standard swing doors,
• door installation,
• automotive doors, or
• door hardware (e.g., hinges, handles, locks, fasteners),

Cahn Litigation Services can identify technologists and professionals to assist. The firm has an earned reputation of providing candidates with the right balance of technical expertise and testimony experience for each unique project.

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Doors Expert Witness - Representative Bios

Please Note: All Cahn Litigation expert witness searches are customized to attorneys' precise specifications and preferences. Attorneys are encouraged to discuss search parameters with a Cahn search specialist.

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The below expert witness bios represent a small fraction of those Doors experts known by Cahn Litigation Services. These bios are provided to give lawyers a sense of the Doors landscape.

• Expert Witness #255847

  This expert is the Principal and Architect of Record at a firm specializing in renovation and historic adaptive reuse projects.

  This expert has provided expert witness services including testimony in over 300 cases for both plaintiff and defense. Qualified to opine on both the construction and interior conditions this expert was retained on a historic residential hotel matter where this expert discovered that the winter season interior environment was too dry, causing the wood architectural finishes, doors, frames and moldings and the furniture to contract, breaking the finishes and glue joints causing these wood finishes and furniture to expand and break apart in the late spring and summer season when the interior environment was too humid.

  This expert is working on two matters where luxury market homeowners were disappointed by the work of their "famous" architects and contractors.

  
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• Expert Witness #234032

  This expert brings to the table many years of automotive industry and consulting experience in the design, development, testing, and analysis of domestic and foreign automotive products and components. This expert's experience gives a broad level of expertise, including the design, performance, testing, and manufacturing of vehicle body systems and components, energy absorbing frame elements, bumpers, roofs, closures (doors systems, hoods, trunk lids, folding tops), seats, trim and sealing systems. This expert has conducted and/or witnessed and analyzed the results from more than 200 full-scale vehicle crash tests in new product development, FMVSS and foreign certification, accident reconstruction validation, and research. This expert has also conducted numerous developmental and FMVSS certification tests on component-level items such as roofs, door beams and structures, door latches, door hinges, seat belt anchorages, and bumper systems.

  This expert's experience with folding roof systems extends back many years when this expert was responsible for development and testing of a manual folding top system. This expert was responsible for the design and development of a luxury car manual folding top and a sports car manual folding top. This expert was contracted full-time as Director of Engineering to develop a power folding hardtop roof system. Sometime later, this expert was engaged as an expert in an IP matter involving the design of a folding roof system, including patent validity and infringement analyses and reports.

  This expert has worked on several patent cases involving the design and function of mechanical systems on automotive products and vehicles.

  
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• Expert Witness #261066

  This expert is an automotive engineer with many years of professional experience, including working directly for automotive manufacturers. This expert has direct design and testing experience in vehicle structures, crashworthiness, and closure systems engineering. This expert applies expertise to expert witness investigations pertaining to vehicle crashworthiness, crash reconstruction, vehicle systems performance, and exterior/interior upper body mechanisms.

  Upon completion of a degree in Mechanical Engineering, this expert held positions in Body Design, Closures Design, and Crash Safety. As a Crash Safety engineer, this expert was responsible for ensuring achievement of dynamic safety targets, both on a component basis and as complete vehicle performance. This included work in both the virtual design phase by simulation analysis, as well as overseeing and analyzing physical crash testing. This expert performed design/test work on sedans, pickup trucks, crossovers, and cargo vehicles throughout the entire development lifecycle and into mass production.

  Continuing an automotive career, this expert then worked in Research & Development, where this expert was responsible for closures design engineering as a design team chief. This expert led a team of design engineers in developing all aspects of minivan slide doors. This expert also served as design chief for minor-model updates on pickup truck door and tailgate closures. This expert has expertise in all elements of upper body design, including structures, dynamic and static crash safety, sealing, NVH, power-door systems, latches, and exterior/interior components, among others.

  This expert earned an Engineering degree from one of the nation's most respected programs. This expert has accumulated a multitude of patents for key innovations in upper body design. This expert's education and deep industry experience designing and testing vehicles qualify this expert to investigate a broad range of vehicle topics.

  
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• Expert Witness #237271

  This expert has many years of experience in the automotive industry. This expert is a veteran of automotive component litigation, having testified at trial numerous times in high profile automotive component matters. This expert has extensive design, testing, and development engineering experience in the automotive industry and is thoroughly experienced in the design of linkages, brackets, sealing, and mounting designs. This expert has tested and worked on structures and systems for vehicles that include sunroofs, convertible roofs, closures, as well as testifying about compliance of these systems to Federal Motor Vehicle Safety Standards, including FMVSS 216 Roof Crush Resistance, FMVSS 214 Side Impact Protection, FMVSS 208 – Occupant Crash Protection, FMVSS 201 Upper Interior Head Protection. This expert has also served as an expert witness and corporate representative, where this expert analyzed defect claims, many of which involved mechanical and structural systems, and testified in depositions and trials throughout the United States.

  Due to extensive experience in the automotive industry, this expert is intimately familiar with sealing issues. For the U.S. Army, this expert worked on numerous systems and their associated issues involving hatches, doors, see-through armor, gates, and the associated mechanisms linkages, reinforcements, as well as systems and components that employ hard or soft materials, as well as the associated accessibility, serviceability, durability and reliability of these systems and components.

  This expert is thoroughly experienced in Design for Assembly as well as the quality and reliability issues associated with component and system design. This expert is a Licensed Professional Engineer with a BS in chemical engineering, and a BS and an MS in electrical engineering.

  This expert has served extensively as an expert witness and has testified, authored reports, and analyzed patents and prior art in numerous automotive cases. This expert has extensive experience in infringement/non-infringement, and patent validity/invalidity, including 101, 102, 103, 112 and prior art arguments for automotive and transportation components and systems, thoroughly understands the issues involved in intellectual property and patent litigation and is a registered patent attorney with the USPTO. This expert has done analyses under literal infringement and the under the doctrine of equivalents, as well as direct infringement, contributory infringement, inducement of infringement, willful infringement, authored numerous reports and declarations and put together claim charts for infringement/non-infringement contentions, invalidity and validity arguments (including secondary considerations such has nexus/commercial success), claim construction hearings (in support of Markman briefs and hearings), and has authored numerous expert reports including ITC testimony documents, for IPR matters as an automotive/mechanical systems expert, for numerous intellectual property and patent cases, and has deposition and/or testified in Inter Partes Review proceedings before the PTAB, as well as various Federal District Courts. This expert also has extensive deposition and trial testimony experience, including testifying experience in IP and patent litigation cases. This expert has authored reports and declarations for numerous intellectual property and patent cases, and has testified in Inter Partes Review proceedings before the PTAB, as well as various Federal District Courts.

  
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• Expert Witness #216341

  This expert provides Expert Witness, Investigation, and Technical Consulting services for Industrial Control Systems, Automated Systems, and Safety Systems. This expert has litigated several cases that involve PLC ladder logic, and has designed scores of systems which utilize PLC code. This expert manages an automation engineering group, and writes/analyzes PLC code virtually every day. Experience includes:

  Automated Machinery – Manufacturing Plants, Production Plants

  Robotics – Assembly Lines, Semiconductor Plants, Packaging Plants

  Control Systems – PLC Controls, Computer Controlled Machines

  Automatic and Revolving Doors

  Amusement Park Rides – Control Systems, Safety Systems

  Bowling Centers – Equipment Systems

  Mining – Surface and Strip Mining, Coal, Quarry, Minerals, Oilsands, Conveyors, and Crushers

  Lasers – Etching Equipment, Production Lines

  Egg Production and Packaging

  Food and Beverage Plants – Snack Foods, Cereal, Pasta, Soft Drinks, Beer, Meat Packaging

  Breweries

  Conveyors – Belt Conveyors, Bucket Conveyors, Packaging Machines, Vibratory Systems

  Wood Production – Sawmills, Chippers, Wood Pellet Plants

  Patents – Control Systems, Automated Devices, Production and Manufacturing Machines

  Contract Disputes – Control Systems, Production Equipment, Manufacturing Equipment

  This expert has acquired many years of experience in electrical, electronic, automation, robotics, bulk materials handling, and mechanical system design. As an inventor, this expert holds several electronic and mechanical patents. This expert’s technical background includes extensive experience with digital logic circuits, vision systems, laser research involving Co2 lasers (Class 4 100 watt), and laser diodes (Class 3B). This expert has established and managed several engineering, CAD, automation, and field service groups, for deployment of automated machinery in the food, beverage, refinery, coal, oil sands, pharmaceutical, and chemical plant industries. Most of this work carried over to the field, where this expert managed electrical and mechanical field construction projects.
  
  This expert’s memberships have included ISA (Instrumentation, Systems, and Automation Society), and AEE (The Association of Energy Engineers). Authorships include Whitepapers for RAM (Remote Asset Management), Energy Management, Automation, and cGMP (Current Good Manufacturing Practice) for FDA related validation procedures in lab environments. Intellectual property and patent experience includes work as a Technical Expert Witness involving patent infringement and automation related accidents.

  
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• Expert Witness #286984

  This plumbing systems and HVAC/mechanical systems expert is a Licensed Professional Engineer and United States Patent Agent whose work is performed in support of litigation, intellectual property disputes, product recalls, insurance investigations, and industrial problem solving. This expert has critiqued product infringement issues within the scope of patent protection and has investigated, analyzed, and reconstructed accidents involving vehicles, machines, mechanical systems, and industrial equipment.

  This expert is a member of several professional organizations, including prominent mechanical engineering, automotive engineering, testing standards, accident reconstruction, and heating, refrigeration, and air-conditioning engineering associations.

  HVAC and plumbing systems experience includes failure analysis of commercial and residential climate control systems, boilers, chillers, humidifiers, commercial cooling towers, radiators, underground piping, frozen pipes, valves, meters, and sprinklers. Intellectual property experience includes reviewing patents and subject products, analyzing the design or performance of products within the scope of associated claims, and creating visual aids to demonstrate conclusions. Experience also includes patent drafting and prior art searches. Product examples include home goods, agricultural equipment, industrial equipment, and toys. Mechanical systems experience includes completing analysis on the design, installation, maintenance, and failure of systems in multiple application areas, including transportation, heavy industry, food industry, exercise equipment, medical equipment, agricultural equipment, home appliances, and office equipment. The analysis is performed with the aid of product research, standards research, product testing, and computational modeling. Examples of transportation include heavy and light vehicles, car haulers, motorcycles, motorized carts, steering systems, brake systems, fifth wheels, axles, drivelines, suspensions, restraint systems, lift gates, combustion motors, superchargers, and turbochargers. Examples of heavy industry include forklift trucks, street sweepers, electric and combustion motors, generators, compressors, industrial pumps, industrial fans, conveyors, crushers, shaker screens, spindles, grinders, industrial peelers, chippers, gearboxes, hydraulic systems, dust collectors, ladders, automated doors and gates, heavy gears, roller bearings, slewing rings, seals, machine guarding, mechanical and powered tools, machining centers, industrial racks, industrial chains, roustabouts, man lifts, elevators, cold forming equipment, forging equipment, safety devices, and safety clothing. Examples of the food industry include can seamers, industrial water purifiers, mixers, and processing equipment. Examples of exercise equipment include stability balls and weightlifting equipment.

  
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• Expert Witness #291237

  This mechanical engineering expert holds a PhD and has over 35 years of combined experience in mechanical engineering across academia and industry. This expert's industry experience spans over 15 years in product development, machine design, energy-efficient appliances and sustainability, thermal systems design, and engineering management. This expert has served as an expert in several cases involving machinery components and systems.

  During industry work, this expert designed and supervised the manufacturing of a broad range of machinery, including high-pressure slider-crank-driven machinery, mechanisms that facilitate interchange between rotary and linear motion, and progressive machinery used in high-volume assembly and production operations. This expert also supervised design projects involving ladders and smart components to increase ladder safety, as well as storage and moving-gate mechanisms involving hinges, air cylinders, and spring-assisted plungers used in lifting mechanisms and overhead doors in upper-end storage systems.

  This expert is an experienced expert witness and litigation consultant with strong experience in patent invalidity analysis and legal procedures.

  
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• Expert Witness #292176

  This structural engineering expert has held a senior role with a highly sought-after consultancy and has over 20 years of experience with forensic investigation, evaluation, and repair design of existing building enclosures, as well as building enclosure consulting and commissioning for new construction projects. In addition to being a Professional Engineer in the State of Texas, this expert is also a Registered Exterior Wall Consultant, Registered Exterior Wall Observer, Certified Construction Specifier, and Certified Construction Contract Administrator. This expert serves on committees and task forces for prominent building enclosure and fenestration industry organizations. During this expert's career, this expert has participated in dozens of building enclosure assessments, including those associated with glass windows and doors, and has designed a number of window and door replacement projects.

  This expert has provided technical consultation, litigation support, and deposition testimony on numerous matters related to building enclosure and structural systems throughout the U.S.

  
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• Expert Witness #295727

  This automatic doors expert directs a small consultancy focused on doors, gates, docks, and automatic doors, with decades of direct industry experience as a manufacturer and as an installation and maintenance contractor.

  This expert has served as president of a national garage door manufacturing industry association and is a voting member of a UL 3235 Standard Technical Panel. This expert has provided expert witness services, including deposition and trial testimony in over 100 civil and criminal cases involving automatic door systems, revolving doors, automatic barrier arm gates, commercial doors, and safety sensors.

  
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• Expert Witness #296091

  This automatic door expert holds CFL, AAADM, CFDAI, and JD credentials and leads a highly respected consultancy specializing in forensic door and lock inspections and investigations.

  This expert is among a limited group of Certified Forensic Locksmiths with AAADM certification. Good knowledge and annual testing are required for certification in ANSI/BHMA A156.10-2017, ANSI/BHMA A156.19-2019, and ANSI/BHMA A156.38-2019 standards for automatic doors. Automatic door repair and installation experience does not necessarily mean a person is AAADM certified, and that distinction can be significant in determining liability when an incident occurs.

  Certification through a door hardware institute includes NFPA 101 Life Safety Code certification as well as NFPA 80 Standards for Fire Doors. Consideration is also given to ICC A117.1-2009 accessible requirements. The consultancy performs many door inspections for state institutions and health care facilities. AAADM automatic door certification requires passing a difficult annual exam involving extensive knowledge of applicable ANSI/BHMA codes and practical application. The forensic process, combined with a legal background, supports analysis of liability issues in forensic investigations.

  Forensic investigations typically begin with visiting the scene of an accident, taking photographs, preparing a sketch, and testing and inspecting the door at issue. When appropriate, a video reenactment may be performed. The process may include a written report of conclusions and expert opinions regarding causation, as well as in-person court testimony when needed.

  This expert has hosted a webinar for an investigative locksmith association on automatic doors and contributed to a forensic locksmith manual published by a locksmith association.

  
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