Granted Patent
Utility
US 4,294,595 · App. 06/170,244
Vacuum cleaner including automatic shutoff device
Inventor:
Leonard E. Bowerman
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jul 18, 1980
Inventor
Leonard E. Bowerman
Assignee (at issue)
Aktiebolaget Electrolux
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.