Granted Patent
Utility
US 5,259,556 · App. 07/819,351
Pressure washer with pressure bypass
Inventors:
Clive Rawlinson Paige, Robert C. Berfield
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Jan 15, 1992
Inventors
Clive Rawlinson Paige
Robert C. Berfield
Assignee (at issue)
SHOP VAC CORPORATION
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.