Granted Patent
Utility
US 4,173,052 · App. 05/852,199
Riding sweeper
Inventors:
Jack L. Burgoon, Christopher M. Knowlton
Patented Case
View Patent ↗
Granted: Nov 6, 1979
Filed: Nov 17, 1977
Inventors
Jack L. Burgoon
Christopher M. Knowlton
Assignee (at issue)
The Scott Fetzer 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.