Patents by Inventor Yasunobu Hiratsuka

Yasunobu Hiratsuka 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).

  • Flat vibration generating apparatus
    Patent number: 5793133
    Abstract: A flat vibration generating apparatus wherein a flat coreless eccentric vibrator armature generates an eccentric vibration desired from the aspect of body feel. An air-core armature coil group thereof consists of m pieces (where m is an integer of 3 or more) of armature coils disposed in superposition with one another in m phases in an arrangement such that they are eccentric and with their phases deviated in a circumferential direction, and that they do not describe a complete disc-like shape as viewed from the axial direction.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: August 11, 1998
    Assignee: Shicoh Engineering Co., Ltd.
    Inventors: Manabu Shiraki, Osami Miyao, Yasunobu Hiratsuka, Soota Komiya