Granted Patent
Utility
US 4,722,293 · App. 06/791,151
Integrated winch and windlass
Inventors:
Derek Foster, Ronald Ballantyne
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Oct 24, 1985
Inventors
Derek Foster
Ronald Ballantyne
Assignee (at issue)
John T. Hepburn, Limited
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.