Granted Patent
Utility
US 5,550,539 · App. 08/354,082
Joy stick type operating lever device
Inventors:
Masatoshi Miki, Toshio Kuwabara, Manabu Tamura
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Dec 6, 1994
Inventors
Masatoshi Miki
Toshio Kuwabara
Manabu Tamura
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.