Granted Patent
Utility
US 4,127,322 · App. 05/637,906
High brightness full color image light valve projection system
Inventors:
Alexander D. Jacobson, Jan Grinberg, Donald E. Sprotbery, Donald D. Boswell
Patented Case
View Patent ↗
Granted: Nov 28, 1978
Filed: Dec 5, 1975
Inventors
Alexander D. Jacobson
Jan Grinberg
Donald E. Sprotbery
Donald D. Boswell
Assignee (at issue)
Hughes Aircraft Company
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.