Granted Patent
Utility
US 5,266,854 · App. 07/575,326
Electromagnetic transducer
Inventor:
Bruce Murray
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Aug 30, 1990
Inventor
Bruce Murray
Assignee (at issue)
Bolt, Beranek and Newman 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.