Granted Patent
Utility
US 4,384,764 · App. 06/185,699
Viewing angle control for liquid-cell display device
Inventors:
Kurt M. Tischer, Fritz Troster, Klaus-Peter Voigt, Rolf Zondler
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Sep 10, 1980
Inventors
Kurt M. Tischer
Fritz Troster
Klaus-Peter Voigt
Rolf Zondler
Assignee (at issue)
International Standard Electric 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.