Granted Patent
Utility
US 4,020,861 · App. 05/606,312
Vapor recovery valve
Inventor:
Marwan S. Shihabi
Patented Case
View Patent ↗
Granted: May 3, 1977
Filed: Aug 20, 1975
Inventor
Marwan S. Shihabi
Assignee (at issue)
International Telephone and Telegraph 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.