Granted Patent
Utility
US 4,750,440 · App. 06/923,484
Hoe-opener assembly
Inventors:
Lorne R. Pollard, Robert Joseph Egging, Walter K. Krahenbuhl
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Oct 27, 1986
Inventors
Lorne R. Pollard
Robert Joseph Egging
Walter K. Krahenbuhl
Assignee (at issue)
J. I. Case Company
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.