Granted Patent
Utility
US 5,524,321 · App. 08/362,553
Vacuum Cleaner with a detachable vacuum module
Inventors:
James M. Weaver, Giovanni Pino, Marc D. Zuiderveen, Steven R. Umbach
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Jan 6, 1995
Inventors
James M. Weaver
Giovanni Pino
Marc D. Zuiderveen
Steven R. Umbach
Assignee (at issue)
BISSELL 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.