Granted Patent
Utility
US 4,889,466 · App. 07/044,942
Control device for a power shovel
Inventors:
Hideo Jindai, Keiji Bando, Masakazu Yoshida, Hideki Yamada
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Mar 18, 1987
Inventors
Hideo Jindai
Keiji Bando
Masakazu Yoshida
Hideki Yamada
Assignee (at issue)
Kabushiki Kaisha Komatsu Shisakusho
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.