Granted Patent
Utility
US 5,144,498 · App. 07/480,172
Variable wavelength light filter and sensor system
Inventor:
Kent D. Vincent
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Feb 14, 1990
Inventor
Kent D. Vincent
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.