Granted Patent
Utility
US 5,642,332 · App. 08/537,972
Acoustic transducer
Inventors:
Win Chang, Algernon S. Badger, Bernard Simensky
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Oct 2, 1995
Inventors
Win Chang
Algernon S. Badger
Bernard Simensky
Assignee (at issue)
I/O Exploration Products (U.S.A.), 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.