Granted Patent
Utility
US 6,269,840 · App. 08/762,896
Valve-in-valve body, vent port and method
Inventor:
Danny D. Beaver
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Dec 10, 1996
Inventor
Danny D. Beaver
Assignee (at issue)
American Standard 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.