Granted Patent
Utility
US 4,732,330 · App. 07/038,431
Drive gearbox and spreader implement
Inventors:
Wilbur E. Groeneveld, David M. Rieke
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Apr 14, 1987
Inventors
Wilbur E. Groeneveld
David M. Rieke
Assignee (at issue)
New Idea 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.