Granted Patent
Utility
US 4,034,478 · App. 05/685,209
Valve seat concentricity gage
Inventor:
William Henry Yager
Patented Case
View Patent ↗
Granted: Jul 12, 1977
Filed: May 11, 1976
Inventor
William Henry Yager
Assignee (at issue)
Bendix Limited
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.