Granted Patent
Utility
US 6,659,056 · App. 10/210,268
Valve train with a single camshaft
Inventor:
Roger D. Sweetland
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: Aug 1, 2002
Inventor
Roger D. Sweetland
Assignee (at issue)
Cummins 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.