Granted Patent
Utility
US 4,387,959 · App. 06/222,836
Rear projection screen
Inventors:
Howard G. Lange, Ronald Schulman
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jan 6, 1981
Inventors
Howard G. Lange
Ronald Schulman
Assignee (at issue)
Zenith Radio 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.