Patents by Inventor Yujiro Murakami

Yujiro Murakami 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).

  • Charger for portable terminal equipment having on-hook/off-hook detecting means and battery identifying means
    Patent number: 5861729
    Abstract: A charger for portable terminal equipment, capable of distinguishing a nickel-hydride battery pack and a nickel-cadmium battery pack and of detecting an on-hook/off-hook condition even when the nickel-hydride battery pack is used. The charger includes a charging circuit, a pair of third charging terminals connected to the charging circuit and adapted to be selectively connected to either a pair of first charging terminals of the nickel-hydride battery pack or a pair of second charging terminals of the nickel-cadmium battery pack, and a third auxiliary terminal adapted to be selectively connected to either a first auxiliary terminal of the nickel-hydride battery pack or a second auxiliary terminal of the nickel-cadmium battery pack.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: January 19, 1999
    Assignee: Fujitsu Limited
    Inventors: Mitsunori Maeda, Kazuki Muneyasu, Masashi Tomura, Hiroshi Kubo, Naoyuki Okumura, Yujiro Murakami, Tetsuya Hanawa, Shinichi Wakayama