Granted Patent
Utility
US 6,412,478 · App. 09/753,367
Breather for internal combustion engine
Inventors:
Gerald C. Ruehlow, Edward Haworth, Dawei Chen
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Jan 2, 2001
Inventors
Gerald C. Ruehlow
Edward Haworth
Dawei Chen
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.