Granted Patent
Utility
US 6,599,018 · App. 09/923,356
Oil-impregnant sintered bearing and manufacturing method thereof, and motor
Inventors:
Tsuneo Maruyama, Junichi Iguchi, Kenji Nishio, Tooru Itoh, Takeshi Tanaka
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Aug 8, 2001
Inventors
Tsuneo Maruyama
Junichi Iguchi
Kenji Nishio
Tooru Itoh
Takeshi Tanaka
Assignees (at issue)
MITSUBISHI MATERIALS CORPORATION
ASMO CO., 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.