Granted Patent
Utility
US 4,567,965 · App. 06/360,297
Propeller brake
Inventor:
Frank Woodruff
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Mar 22, 1982
Inventor
Frank Woodruff
Assignee (at issue)
ALLIED CONSULTING, 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.