Granted Patent
Utility
US 4,237,526 · App. 05/907,852
Battery operated device having a waterproof housing and gas discharge vent
Inventor:
David H. Wood
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: May 19, 1978
Inventor
David H. Wood
Assignee (at issue)
Union Carbide 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.