Granted Patent
Utility
US 4,258,536 · App. 06/010,267
Power rotary cutting blade with retractable cutting knives
Inventors:
Earl H. Kidd, Herman H. Martin, Raymond R. Reid, Jr.
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Feb 7, 1979
Inventors
Earl H. Kidd
Herman H. Martin
Raymond R. Reid, Jr.
Assignee (at issue)
Outboard Marine Corporation
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.