Granted Patent
Utility
US 4,240,569 · App. 05/921,194
Carpet cleaning powder dispenser
Inventor:
Walter L. Bessinger
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jul 3, 1978
Inventor
Walter L. Bessinger
Assignee (at issue)
Clarke-Gravely 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.