Granted Patent
Utility
US 4,588,034 · App. 06/674,892
Vibratory plow blade
Inventors:
Emil T. Leonard, Robert G. Draney
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Nov 26, 1984
Inventors
Emil T. Leonard
Robert G. Draney
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.