Granted Patent
Utility
US 6,502,500 · App. 09/845,704
Hydraulic system for a work machine
Inventor:
Kazunori Yoshino
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Apr 30, 2001
Inventor
Kazunori Yoshino
Assignee (at issue)
Caterpillar Inc.
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.