Granted Patent
Utility
US 4,855,913 · App. 07/055,820
Electronic control system for powershift transmission
Inventors:
Kevin L. Brekkestran, John C. Thomas
Patented Case
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Granted: Aug 8, 1989
Filed: May 29, 1987
Inventors
Kevin L. Brekkestran
John C. Thomas
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.