Granted Patent
Utility
US 4,973,148 · App. 06/706,481
Optical accessory for use with spectacles
Inventor:
Albert E. Gazeley
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Feb 28, 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.