Granted Patent
Utility
US 4,151,980 · App. 05/843,934
Winch
Inventors:
John David Burton, Richard D. J. Huggett
Patented Case
View Patent ↗
Granted: May 1, 1979
Filed: Oct 20, 1977
Inventors
John David Burton
Richard D. J. Huggett
Assignee (at issue)
Lewmar Mrine 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.