Patents by Inventor Hirofumi Yoshimura

Hirofumi Yoshimura 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).

  • Sound-recording motion-picture camera
    Patent number: 3972604
    Abstract: A motion-picture camera having exposure and sound-recording structures past which the film is transported by a pair of film-transporting structures, respectively, at least one of which is driven by a variable speed electric motor. The film is transported both forwardly and rearwardly and forms between the exposure and sound-recording structures a loop from which the film is continuously transported to the sound-recording structure and to which the film is transported in a stepwise manner from the exposure structure.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: August 3, 1976
    Assignee: Kabushiki Kaisha Yashica
    Inventors: Hirofumi Yoshimura, Toyonori Higuma, Noriaki Itoo
  • Method for producing a low temperature high strength tough steel
    Patent number: 3960612
    Abstract: A low temperature high strength tough steel is provided by effecting a series of heat treatments at predetermined temperatures.The steel comprises C, Si, Mn, Ni, Mo, Nb, N, Al, and if necessary, V, Ti, Cr, Ca or Ce in predetermined amounts with the rest iron and unavoidable impurities.
    Type: Grant
    Filed: August 7, 1974
    Date of Patent: June 1, 1976
    Assignee: Nippon Steel Corporation
    Inventors: Katsuo Kaku, Hirofumi Yoshimura, Hiroshi Yada, Naoomi Yamada
  • Fading audio-level controls for sound-recording motion picture cameras
    Patent number: 3950083
    Abstract: A motion picture camera capable of recording sound simultaneously with film exposure and capable of carrying out fade-out as well as fade-in operations. A control is provided for automatically reducing the audio level during a fade-out operation and for automatically increasing the audio level during a fade-in operation.
    Type: Grant
    Filed: October 18, 1974
    Date of Patent: April 13, 1976
    Assignee: Kabushiki Kaisha Yashika
    Inventors: Hirofumi Yoshimura, Toyonori Higuma, Noriaki Itoo