Granted Patent
Utility
US 4,575,783 · App. 06/533,320
Reflector for illuminating signs
Inventor:
Douglas S. Hammond
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Sep 16, 1983
Inventor
Douglas S. Hammond
Assignee (at issue)
Manville Service 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.