Granted Patent
Utility
US 6,269,637 · App. 09/341,271
Hydraulic pressure control circuit for a working machine
Inventors:
Hidetake Motomura, Hiroaki Tada
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Jul 7, 1999
Inventors
Hidetake Motomura
Hiroaki Tada
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.