Granted Patent
Utility
US 4,266,144 · App. 06/038,520
Detection means for multiple capacitive sensing devices
Inventor:
Robert G. Bristol
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: May 14, 1979
Inventor
Robert G. Bristol
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.