Granted Patent
Utility
US 5,286,171 · App. 07/848,176
Method for controlling engine for driving hydraulic pump to operate hydraulic actuator for construction equipment
Inventors:
Isao Murota, Naoyuki Moriya, Kazuhito Nakai
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Mar 10, 1992
Inventors
Isao Murota
Naoyuki Moriya
Kazuhito Nakai
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.