Granted Patent
Utility
US 4,730,108 · App. 06/851,000
Ambient light insensitive circuit with frequency matching
Inventors:
David R. Rodal, Nathan W. Osborn
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Apr 11, 1986
Inventors
David R. Rodal
Nathan W. Osborn
Assignee (at issue)
Ampex 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.