Granted Patent
Utility
US 6,811,316 · App. 10/317,242
Water pump bearing
Inventors:
Kenichi Yamashita, Ai Shiozuka
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Dec 11, 2002
Inventors
Kenichi Yamashita
Ai Shiozuka
Assignees (at issue)
Uchiyama Kogyo Co., Ltd.
Fag Kugelfischer Georg Shäfer AG
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.