Granted Patent
Utility
US 4,393,013 · App. 06/288,360
Vapor mass flow control system
Inventor:
Joseph McMenamin
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Jul 30, 1981
Inventor
Joseph McMenamin
Assignee (at issue)
J.C. Schumacher Co.
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.