Granted Patent
Utility
US 4,277,172 · App. 06/091,317
Soft contact lens apparatus
Inventor:
William D. Richards
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: Nov 5, 1979
Inventor
William D. Richards
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.