Granted Patent
Utility
US 4,346,617 · App. 06/163,553
Ground drive control
Inventors:
Philip W. Schroeder, Edgar K. Lindstrom
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Jun 27, 1980
Inventors
Philip W. Schroeder
Edgar K. Lindstrom
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.