Granted Patent
Utility
US 4,755,663 · App. 06/939,169
Textured surface, graded gap switch for transmission line optical detectors
Inventor:
Gustav E. Derkits, Jr.
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Dec 8, 1986
Inventor
Gustav E. Derkits, Jr.
Assignee (at issue)
Bell Communications Research, 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.