Granted Patent
Utility
US 3,961,643 · App. 05/528,632
Valve shifting system
Inventor:
Peter Lynch
Patented Case
View Patent ↗
Granted: Jun 8, 1976
Filed: Dec 2, 1974
Inventor
Peter Lynch
Assignee (at issue)
Rader Companies, 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.