Granted Patent
Utility
US 5,582,349 · App. 08/538,140
Hydroblasting spray gun having an on/off safety switch system
Inventor:
Thomas B. Boisture
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: Oct 2, 1995
Inventor
Thomas B. Boisture
Assignee (at issue)
C.H. Heist Corp.
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.