Granted Patent
Utility
US 4,516,638 · App. 06/497,747
Soil aerating apparatus with hydraulic valve arrangement
Inventors:
John E. Hicks, James J. Kubat
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: May 25, 1983
Inventors
John E. Hicks
James J. Kubat
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.