Granted Patent
Utility
US 6,240,946 · App. 09/154,905
Switch valve
Inventor:
Marvin E. Beasley
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Sep 17, 1998
Inventor
Marvin E. Beasley
Assignee (at issue)
Tyco Flow Control Kabushiki Kaisha
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.