IP Library › Granted Patent US 4,972,994
Granted Patent Utility
US 4,972,994 · App. 07/378,386

Operational mode conversion for pressure washer spray

Inventors: Michael B. Woodhall, Michael F. Standley
Patented Case View Patent ↗
Granted: Nov 27, 1990 Filed: Jul 11, 1989
Inventors
Michael B. Woodhall
Michael F. Standley
Assignee (at issue)
SHOP VAC CORPORATION

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Quick Facts
Patent No.
US 4,972,994
App. No.
07/378,386
Filed
1989-07-11
Granted
1990-11-27
Kind
A