Granted Patent
Utility
US 5,877,490 · App. 08/908,677
Quadrant light detector
Inventors:
David P. Ramer, Jack C. Rains, Jr.
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Aug 7, 1997
Inventors
David P. Ramer
Jack C. Rains, Jr.
Assignee (at issue)
Advanced Optical Technologies, Inc.
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.