Granted Patent
Utility
US 4,293,169 · App. 06/087,004
Water bearing
Inventor:
Harold G. Inhofer
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Oct 22, 1979
Inventor
Harold G. Inhofer
Assignee (at issue)
Aeration Industries, 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.