Granted Patent
Utility
US 5,223,801 · App. 07/860,152
Crystal oscillator and transmitter operating at the third harmonic of the fifth overtone of a crystal
Inventor:
John Bergman
Patented Case
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Granted: Jun 29, 1993
Filed: Mar 30, 1992
Inventor
John Bergman
Assignee (at issue)
Interactive Technologies, 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.