Granted Patent
Utility
US 6,748,738 · App. 10/146,899
Hydraulic regeneration system
Inventor:
David P. Smith
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: May 17, 2002
Inventor
David P. Smith
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.