Granted Patent
Utility
US 4,124,860 · App. 05/669,105
Optical coupler
Inventor:
Herman D. Johnson
Patented Case
View Patent ↗
Granted: Nov 7, 1978
Filed: Mar 22, 1976
Inventor
Herman D. Johnson
Assignee (at issue)
Optron, 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.