Granted Patent
Utility
US 4,881,602 · App. 07/228,984
Turf aerating tine
Inventors:
Loren F. Hansen, Mark L. Cozine
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Aug 5, 1988
Inventors
Loren F. Hansen
Mark L. Cozine
Assignee (at issue)
Outboard Marine Corporation
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.