Granted Patent
Utility
US 4,242,066 · App. 05/936,205
Rotary pumps and motors and thrust plates therefor
Inventor:
Robert F. Hodgson
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Aug 24, 1978
Inventor
Robert F. Hodgson
Assignee (at issue)
Commercial Shearing, Inc.
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.