Patents by Inventor Kenjiro Hagiwara

Kenjiro Hagiwara 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).

  • Synthetic resin panel welding method and hollow panel structures fabricated by the method
    Patent number: 5965238
    Abstract: Portions of a thermoplastic synthetic resin panel (B) formed by extrusion and integrally having a first sheet (2a), a second sheet (2b) parallel to the first sheet (2a), and a plurality of ribs (3) integrally joining the first and second sheets (2a, 2b) are welded together by ultrasonic welding by applying an ultrasonic welding head (6) and a work support block (7) of an ultrasonic welding machine to the first sheet (2a) and the second sheet (2b), respectively, and compressing the portions of the thermoplastic synthetic resin panel (B) between the ultrasonic welding head (6) and the work support block (7).
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: October 12, 1999
    Assignees: Kishimoto Sangyo Co., Ltd., Unitek Co., Ltd.
    Inventors: Tsuyoshi Saitoh, Kenjiro Hagiwara, Hisashi Sasaki