Granted Patent
Utility
US 4,093,433 · App. 05/492,705
Damper assembly for mobile bed scrubber
Inventor:
Mervin L. Smith
Patented Case
View Patent ↗
Granted: Jun 6, 1978
Filed: Jul 29, 1974
Inventor
Mervin L. Smith
Assignee (at issue)
AMERICAN AIR FILTER COMPANY, INC.
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.