Granted Patent
Utility
US 6,372,148 · App. 09/684,222
Apparatus for purifying spas/jetted tubs
Inventors:
Frank G. Martin, Dennis Lavelle
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Oct 6, 2000
Inventors
Frank G. Martin
Dennis Lavelle
Assignee (at issue)
DEL INDUSTRIES 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.