Granted Patent
Utility
US 6,408,875 · App. 09/973,051
Piping structure of a working machine
Inventors:
Hiroyasu Nishikawa, Takahiro Iwamoto, Toshiyuki Matsumoto
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Oct 10, 2001
Inventors
Hiroyasu Nishikawa
Takahiro Iwamoto
Toshiyuki Matsumoto
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.