Granted Patent
Utility
US 5,357,486 · App. 07/989,372
Acoustic transducer
Inventor:
Richard E. Pearce
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Dec 2, 1992
Inventor
Richard E. Pearce
Assignee (at issue)
Innovative Transducers, Inc.
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.