Granted Patent
Utility
US 6,068,017 · App. 09/167,181
Dual-fuel valve
Inventors:
Edward Haworth, Dawei Chen, Gerald C. Ruehlow
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Oct 6, 1998
Inventors
Edward Haworth
Dawei Chen
Gerald C. Ruehlow
Assignee (at issue)
Generac Power Systems, 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.