Granted Patent
Utility
US 5,653,583 · App. 08/594,833
Oil hydraulic pump
Inventors:
Tetsuji Hayashi, Masaharu Minowa
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Jan 31, 1996
Inventors
Tetsuji Hayashi
Masaharu Minowa
Assignee (at issue)
KAYABA INDUSTRY 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.