Granted Patent
Utility
US 4,157,734 · App. 05/874,504
Soil aerating device
Inventor:
Charles E. Hines
Patented Case
View Patent ↗
Granted: Jun 12, 1979
Filed: Feb 2, 1978
Inventor
Charles E. Hines
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.