Granted Patent
Utility
US 4,878,262 · App. 07/162,168
Automotive scrubber
Inventors:
Frank L. Stufflebeam, James A. Nelson
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Feb 29, 1988
Inventors
Frank L. Stufflebeam
James A. Nelson
Assignee (at issue)
RYKO MANUFACTURING 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.