Patents by Inventor Yasutake Nishimura

Yasutake Nishimura 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).

  • Headphone
    Patent number: 4058688
    Abstract: A headphone capable of attaining binaural hearing giving substantially the same sound quality as one would expect from ordinary loudspeakers, said headphone having such sound pressure versus frequency characteristics that there are two peaks between 1.5 and 5 KHz and the level differences between the low level area and the peaks are limited within the range of 6 to 17 dB. The headphone leads the sound from a transducer through the outside as well as inside of the headphone to the ears.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: November 15, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasutake Nishimura, Mitsuhiro Hasegawa
  • 4-Channel headphones
    Patent number: 3984885
    Abstract: A structure of four-channel headphones having sound insulating means between front and rear channel driver units, and tone control means only for the front channel tones, said sound insulating means being formed of foam material which transmits low-pitched tones and absorbs high-pitched tones. Separation of the front and the rear channel tones is improved to closely resemble four-channel sound reproduction in a free field and the output levels of the medium-high range tones of the two front channels are made variable.
    Type: Grant
    Filed: March 4, 1975
    Date of Patent: October 12, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hisashi Yoshimura, Yasutake Nishimura
  • Head phone
    Patent number: D246259
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: November 1, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasutake Nishimura, Mitsuhiro Hasagawa