Granted Patent
Utility
US 4,200,951 · App. 05/840,735
Machine for cleaning surfaces
Inventors:
Jack L. Burgoon, William R. Smith
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Oct 11, 1977
Inventors
Jack L. Burgoon
William R. Smith
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.