Granted Patent
Utility
US 5,826,486 · App. 08/822,056
Hydraulic circuit
Inventor:
Yoshiyuki Shimada
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Mar 24, 1997
Inventor
Yoshiyuki Shimada
Assignee (at issue)
Shin Caterpillar Mitsubishi 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.