Granted Patent
Utility
US 5,522,908 · App. 08/249,339
Filter bag for a vacuum cleaner
Inventor:
Robert A. Frey
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: May 27, 1994
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.