Granted Patent
Utility
US 4,214,225 · App. 05/972,874
Signal transducing device
Inventor:
Laurence N. Wesson
Patented Case
View Patent ↗
Granted: Jul 22, 1980
Filed: Dec 26, 1978
Inventor
Laurence N. Wesson
Assignee (at issue)
TRW Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.