Granted Patent
Utility
US 4,350,489 · App. 06/213,521
Dome field of view scene extenders
Inventor:
David P. Gdovin
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Dec 5, 1980
Inventor
David P. Gdovin
Assignee (at issue)
The Singer Company Limited
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.