Granted Patent
Utility
US 5,118,207 · App. 07/708,849
Rolling bearing cages
Inventors:
Fumitoshi Ikejiri, Noboru Umemto
Patented Case
View Patent ↗
Granted: Jun 2, 1992
Filed: May 31, 1991
Inventors
Fumitoshi Ikejiri
Noboru Umemto
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.