Granted Patent
Utility
US 5,876,193 · App. 08/783,802
Oil pump rotor having a generated cycloid curve
Inventors:
Katsuaki Hosono, Manabu Katagiri
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Jan 15, 1997
Inventors
Katsuaki Hosono
Manabu Katagiri
Assignee (at issue)
MITSUBISHI MATERIALS CORPORATION
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.