Granted Patent
Utility
US 4,986,592 · App. 07/478,656
Anti-glare device
Inventors:
Klaus Kaiser, Lothar Viertel, Patrick Welter
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Feb 12, 1990
Inventors
Klaus Kaiser
Lothar Viertel
Patrick Welter
Assignee (at issue)
Gebr. Happich GmbH
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.