Granted Patent
Utility
US 4,848,893 · App. 07/100,371
Spectacle frame with lockable custom fitting nosepiece
Inventor:
Clark L. Grendol
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Sep 24, 1987
Inventor
Clark L. Grendol
Assignee (at issue)
American Optical 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.