Granted Patent
Utility
US 4,842,391 · App. 07/152,958
Two spherical lens optical coupler
Inventors:
Ernest M. Kim, Jack Peter
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Feb 5, 1988
Inventors
Ernest M. Kim
Jack Peter
Assignee (at issue)
Tacan 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.