ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,396, issued on Feb. 18, was assigned to TADANO LTD. (Kagawa, Japan).
"Work machine" was invented by Masahide Zushi (Kagawa, Japan), Kazu Nagahama (Kagawa, Japan), Toshihiko Fukuoka (Kagawa, Japan) and Manato Shirai (Kagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "This work machine includes: an actuator that extends and retracts a telescopic boom; an electric drive source that is provided in the actuator and drives using power supplied from a power source; an operating unit that operates based on power of the electric drive source; an electric circuit capable of switching between a drive state in which a supply of power from the power so...