Granted Patent
Utility
US 5,657,707 · App. 08/503,382
Spring-tine residue wheel for planters
Inventors:
Michael J. Dresher, Stanley R. Clark, Eric Johnson
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jul 17, 1995
Inventors
Michael J. Dresher
Stanley R. Clark
Eric Johnson
Assignee (at issue)
Great Plains Manufacturing, Inc.
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.