Granted Patent
Utility
US 6,234,776 · App. 09/077,822
Vane pump
Inventors:
Tetsuji Hayashi, Kenichi Kuga
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Jan 8, 1999
Inventors
Tetsuji Hayashi
Kenichi Kuga
Assignee (at issue)
Kayaba Kogyo Kabushiki Kaisha
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.