Granted Patent
Utility
US 5,018,313 · App. 07/406,353
Roundness processing device of a slipper surface of a rocker arm
Inventors:
Shuji Yamane, Seiji Tou
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Sep 12, 1989
Inventors
Shuji Yamane
Seiji Tou
Assignee (at issue)
Kabushiki Kaisha Nisshin Seisa Kusho
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.