Granted Patent
Utility
US 4,291,280 · App. 05/960,918
AC Generator system having stabilized sensitivity for sensing the presence or absence of a conductive object
Inventor:
George A. Gardner
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Nov 15, 1978
Inventor
George A. Gardner
Assignee (at issue)
Sybron Corporation
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.