Granted Patent
Utility
US 6,481,407 · App. 09/540,269
Thin-walled valve guide insert and method for installing same within a cylinder head construction
Inventor:
James A. Kammeraad
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Mar 31, 2000
Inventor
James A. Kammeraad
Assignee (at issue)
K-LINE INDUSTRIES, 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.