Patents by Inventor Hisayoshi Kawahara

Hisayoshi Kawahara 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).

  • Underwater rising/falling device
    Patent number: 9102390
    Abstract: Provided is an underwater elevating apparatus, wherein the cable is not paid out unexpectedly by self-buoyancy while waiting underwater, excessive paying out of the cable may be prevented by a latch unit having simple mechanisms, and electric power does not be used needlessly.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: August 11, 2015
    Assignee: NiGK CORPORATION
    Inventors: Hisayoshi Kawahara, Tetsuya Nakamura, Jungo Ohta
  • UNDERWATER RISING/FALLING DEVICE
    Publication number: 20140348593
    Abstract: Provided is an underwater elevating apparatus, wherein the cable is not paid out unexpectedly by self-buoyancy while waiting underwater, excessive paying out of the cable may be prevented by a latch unit having simple mechanisms, and electric power does not be used needlessly.
    Type: Application
    Filed: September 11, 2012
    Publication date: November 27, 2014
    Applicant: NIGK CORPORATION
    Inventors: Hisayoshi Kawahara, Tetsuya Nakamura, Jungo Ohta