Granted Patent
Utility
US 4,236,503 · App. 05/956,549
Grate with adjustable vents
Inventor:
Wayne T. Kemp
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Oct 30, 1978
Inventor
Wayne T. Kemp
Assignee (at issue)
Raytheon 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.