Granted Patent
Utility
US 4,912,613 · App. 07/315,550
Cover lens for light
Inventor:
Bruce A. Sanborn
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Feb 27, 1989
Inventor
Bruce A. Sanborn
Assignee (at issue)
MDT CO.,LTD.
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.