Granted Patent
Utility
US 6,035,479 · App. 09/076,251
Sweeper with auxiliary brush and auxiliary lip
Inventors:
Michael T. Basham, Christopher M. Danielson, Joseph F. D'Costa
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: May 12, 1998
Inventors
Michael T. Basham
Christopher M. Danielson
Joseph F. D'Costa
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.