Granted Patent
Utility
US 6,544,021 · App. 09/951,500
Oil pump
Inventors:
Yasushi Watanabe, Hideaki Ohnishi
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Sep 14, 2001
Inventors
Yasushi Watanabe
Hideaki Ohnishi
Assignee (at issue)
Unisia Jecs 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.