Granted Patent
Utility
US 4,366,407 · App. 06/174,711
Incandescent lamp with selective color filter
Inventor:
Peter J. Walsh
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Aug 1, 1980
Inventor
Peter J. Walsh
Assignee (at issue)
Duro-Test 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.