Granted Patent
Utility
US 4,867,244 · App. 07/120,948
Turf aerating apparatus
Inventors:
Mark L. Cozine, David G. Ferguson, Loren F. Hansen, Mark E. Lamb
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Nov 16, 1987
Inventors
Mark L. Cozine
David G. Ferguson
Loren F. Hansen
Mark E. Lamb
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.