Granted Patent
Utility
US 6,694,860 · App. 10/006,895
Hydraulic control system with regeneration
Inventor:
Kazunori Yoshino
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Dec 10, 2001
Inventor
Kazunori Yoshino
Assignees (at issue)
Caterpillar Inc.
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.