Granted Patent
Utility
US 4,354,738 · App. 06/246,825
Front projection screen with precision gain control
Inventors:
Frederic N. Forehand, Richard A. Mecklenborg
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Mar 23, 1981
Inventors
Frederic N. Forehand
Richard A. Mecklenborg
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.