Granted Patent
Utility
US 4,245,520 · App. 05/853,369
Reversing apparatus
Inventor:
Harold W. Semar
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Nov 21, 1977
Inventor
Harold W. Semar
Assignee (at issue)
Westinghouse Electric Company LLC
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.