Patents by Inventor Teruhisa Tsumura

Teruhisa Tsumura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electric power supply
    Patent number: 5371667
    Abstract: An electric power supply includes: a full-wave rectifier to rectify full-wave rectifying an ac input voltage; a switch for switching an output current of the rectifier; a signal generator for generating a target signal to force a dc output voltage to follow a reference voltage, and a controller for controlling a switching timing of the switch and for repeating the operations of turning off the switch when a current detection signal of the switch complies with the target signal and turning on the switch again after a predetermined short period of time.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: December 6, 1994
    Assignee: Fuji Electrochemical Co., Ltd.
    Inventors: Fumiaki Nakao, Teruhisa Tsumura, Toshihiro Shimizu, Toshio Shibata