Granted Patent
Utility
US 4,261,161 · App. 06/095,127
Agricultural machinery protective system
Inventors:
David J. Colgrove, Antoon S. P. Cools, Eric A. Mortier
Patented Case
View Patent ↗
Granted: Apr 14, 1981
Filed: Nov 16, 1979
Inventors
David J. Colgrove
Antoon S. P. Cools
Eric A. Mortier
Assignee (at issue)
Sperry Corp.
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.