Granted Patent
Utility
US 4,384,773 · App. 06/299,844
Digital light-to-frequency converter with preset voltage
Inventor:
Warren Hambly
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Sep 8, 1981
Inventor
Warren Hambly
Assignee (at issue)
Polaroid 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.