Granted Patent
Utility
US 5,829,094 · App. 08/802,372
Sweeper with electromagnetic filter cleaning
Inventors:
Bruce F. Field, Laurence A. Jensen, Charles W. Bricher
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Feb 19, 1997
Inventors
Bruce F. Field
Laurence A. Jensen
Charles W. Bricher
Assignee (at issue)
TENNANT COMPANY
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.