Granted Patent
Utility
US 4,369,407 · App. 06/295,262
Regulator tester
Inventor:
George K. Korbell
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Aug 24, 1981
Inventor
George K. Korbell
Assignee (at issue)
Sheller-Globe 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.