Granted Patent
Utility
US 6,505,592 · App. 09/949,514
Valve train for twin cam three-valve engine
Inventors:
Alan W. Hayman, James J. Mazzola, III
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Sep 7, 2001
Inventors
Alan W. Hayman
James J. Mazzola, III
Assignee (at issue)
General Motors 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.