Granted Patent
Utility
US 5,799,633 · App. 08/908,894
Electrical insulator with a duckbill-shaped valve
Inventor:
John C. Miller
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Aug 8, 1997
Inventor
John C. Miller
Assignee (at issue)
Lexington Insulators
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.