Granted Patent
Utility
US 4,907,895 · App. 07/176,170
Optical chopper for infrared thermometer
Inventor:
Charles E. Everest
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Mar 31, 1988
Inventor
Charles E. Everest
Assignee (at issue)
IVAC 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.