Granted Patent
Utility
US 6,463,841 · App. 09/898,175
Lift cylinder
Inventors:
Susumu Niwa, Kouiti Kanematsu
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Jul 3, 2001
Inventors
Susumu Niwa
Kouiti Kanematsu
Assignee (at issue)
Kayaba Kogyo Kabushiki Kaisha
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.