Granted Patent
Utility
US 5,623,910 · App. 08/347,283
Check and vent valve assembly
Inventor:
Russell K. Riggle
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Nov 30, 1994
Inventor
Russell K. Riggle
Assignee (at issue)
WALBRO LLC
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.