Granted Patent
Utility
US 4,532,951 · App. 06/479,657
Transducer utilizing electrical and pneumatic signals
Inventor:
Raymond J. Fermanich
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Mar 28, 1983
Inventor
Raymond J. Fermanich
Assignee (at issue)
Barber-Coleman Company
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.