Granted Patent
Utility
US 6,408,873 · App. 09/625,033
Piston-type flush valve having a triple filtered bypass
Inventors:
David C. Hall, Martin E. Marcichow
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Jul 24, 2000
Inventors
David C. Hall
Martin E. Marcichow
Assignee (at issue)
Sloan Valve Company
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.