Granted Patent
Utility
US 4,494,270 · App. 06/478,887
Vacuum cleaner wand
Inventors:
William P. Ritzau, Aveo J. Casselli, Gene Fleischer
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Mar 25, 1983
Inventors
William P. Ritzau
Aveo J. Casselli
Gene Fleischer
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.