Granted Patent
Utility
US 4,424,724 · App. 06/309,951
Multi-position ratchet mechanism
Inventors:
John R. Bookwalter, Alan I. West
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Oct 9, 1981
Inventors
John R. Bookwalter
Alan I. West
Assignee (at issue)
Codman & Shurtleff, 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.