Granted Patent
Utility
US 5,820,106 · App. 08/908,905
Guided gate valve
Inventor:
David A. Wurangian
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Aug 8, 1997
Inventor
David A. Wurangian
Assignee (at issue)
BW/IP International, 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.