Granted Patent
Utility
US 4,890,910 · App. 06/777,640
Optical accessory for spectacles
Inventor:
Albert E. Gazeley
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Sep 19, 1985
Inventor
Albert E. Gazeley
Assignee (at issue)
Polaroid 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.