Granted Patent
Utility
US 4,909,332 · App. 07/155,398
Vibratory plow
Inventor:
Edgar K. Lindstrom
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Feb 12, 1988
Inventor
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.