Defendant
1 case as defendant.
Note on the entity: Lionel B. Cornwell is not a company. He was an individual American engineer and inventor, Lionel Brice Cornwell (1901–1988), best known as chief engineer of the Cinaudagraph Corporation. He has no corporate headquarters, ticker, or ownership structure, and the single tracked matter is a state-court contract action rather than a patent infringement suit.
Background and operations. Cornwell was an audio engineer who designed full-range electrodynamic and permanent-magnet loudspeaker drivers in the 1930s. He joined Cinaudagraph Corp. of Stamford, Connecticut — a loudspeaker manufacturer founded in the mid-1930s and associated with industrialist John Sherman Hoyt and his son Sherman R. Hoyt Jr. — as chief engineer, and presented Cinaudagraph work on permanent-magnet loudspeakers to the Society of Motion Picture Engineers. A hobbyist archive (RadioMuseum) estimates the Stamford plant at roughly 30 employees with about four engineers and one chemist; no audited headcount or revenue figures are available. He later appears in connection with Aireon Manufacturing Corp.'s Cinaudagraph Speakers, Inc. subsidiary in Chicago/Slater, Missouri, which supplied loudspeakers for Aireon electronic phonographs and jukeboxes.
Patent activity. Cornwell is named as an inventor on a handful of the roughly 17 Cinaudagraph-assigned patents (1935 onward), covering loudspeaker reproducers, magnet structures, sound-reproducer drives, film processing, and sub-standard motion-picture sound film, alongside co-inventors such as Robert Neuschotz and Jesse M. Blaney. This is an inventor's personal portfolio tied to his employer, not an asserted licensing portfolio.
Litigation posture. The only tracked case is Cinaudagraph Corporation v. Cornwell, 27 A.2d 375, 129 Conn. 295 (Supreme Court of Connecticut, 1942). Cornwell appears solely as defendant (0 plaintiff cases). The dispute concerned reformation of a series of 1935–1938 employment and patent-royalty agreements after Cinaudagraph ceased loudspeaker manufacture in December 1939 and discharged him; the court affirmed reformation of the contract for mutual scrivener's error. It is a contract case, not an infringement action, and no plaintiff-friendly patent venue is involved. There is no evidence Cornwell ever asserted patents or functioned as a non-practicing entity.
Sources: CourtListener opinion (Cinaudagraph Corp. v. Cornwell, 1942); RadioMuseum manufacturer history; World Radio History trade-press archives (Radio Today, Electronic Industries, Service); GoodIP patent-assignee data; Justia inventor listing.
Contract/reformation proceeding between Cinaudagraph Corporation and Lionel B. Cornwell over a royalty/license agreement covering Cornwell's loudspeaker patent; the Connecticut Supreme Court affirmed the trial court's reformation for Cinaudagraph. The narrative identifies it as not a patent infringement suit, and the opinion does not explicitly cite US Patent 2,200,490.