Granted Patent
Utility
US 5,658,362 · App. 08/708,632
Vacuum cleaner and filter bag with air management
Inventor:
Robert A. Frey
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Sep 6, 1996
Inventor
Robert A. Frey
Assignee (at issue)
HMI Industries, 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.