Granted Patent
Utility
US 4,345,459 · App. 06/198,058
Sensing device
Inventors:
Ralph A. Perry, James Booe
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Oct 17, 1980
Inventors
Ralph A. Perry
James Booe
Assignee (at issue)
Emhart Industries, 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.