Granted Patent
Utility
US 6,415,604 · App. 09/601,107
Hydraulic control circuit for work machine
Inventors:
Hidetake Motomura, Hiroaki Tada
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Oct 2, 2000
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.