Granted Patent
Utility
US 4,195,969 · App. 05/867,348
Vacuum cleaner
Inventor:
Robert P. Whitney
Patented Case
View Patent ↗
Granted: Apr 1, 1980
Filed: Jan 5, 1978
Inventor
Robert P. Whitney
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.