Granted Patent
Utility
US 5,990,428 · App. 09/091,743
Pressure switch for hydraulic pump
Inventors:
Tetsuji Hayashi, Kenichi Kuga
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Nov 2, 1998
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.