Granted Patent
Utility
US 4,816,714 · App. 07/102,396
Corner cube array for use in incandescent lamps
Inventor:
Peter J. Walsh
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Sep 29, 1987
Inventor
Peter J. Walsh
Assignee (at issue)
Duro-Test 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.