Granted Patent
Utility
US 5,409,068 · App. 08/064,636
Dual penetration combination sweep with ripper
Inventors:
Kenneth A. Hake, Rodney D. Hake, Mark A. Eilert
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: May 20, 1993
Inventors
Kenneth A. Hake
Rodney D. Hake
Mark A. Eilert
Assignee (at issue)
Kent Manufacturing Co., 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.