Granted Patent
Utility
US 5,690,178 · App. 08/601,181
Sod cutter
Inventors:
Claude D. Zehrung, Jr., William H. Oliver
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Feb 14, 1996
Inventors
Claude D. Zehrung, Jr.
William H. Oliver
Assignee (at issue)
BlueBird International, 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.