Patents by Inventor Hitoshi Masamura

Hitoshi Masamura 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).

  • Cellular phone with high-quality sound reproduction capability
    Patent number: 6819939
    Abstract: In a cellular phone, stereophonic sound reproduction of music etc. is realized by using a microphone and a speaker of the cellular phone as stereophonic speakers. By the stereophonic sound reproduction function, radio broadcasting from FM stations, streaming sound from the Internet, etc. are reproduced by the cellular phone. The speaker and the microphone are removed from the front of the housing of the cellular phone (where a display and operation buttons are mounted) and are placed on the back of the housing, thereby the diameters of the speaker and the microphone are enlarged and thereby wide-range and high-volume-level sound reproduction is realized. The speaker and the microphone are preferably implemented by low-profile flat-panel speakers that are functionally equivalent.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: November 16, 2004
    Assignee: Nec Viewtechnology, Ltd.
    Inventor: Hitoshi Masamura
  • Cellular phone with high-quality sound reproduction capability
    Publication number: 20020137478
    Abstract: In a cellular phone, stereophonic sound reproduction of music etc. is realized by using a microphone and a speaker of the cellular phone as stereophonic speakers. By the stereophonic sound reproduction function, radio broadcasting from FM stations, streaming sound from the Internet, etc. are reproduced by the cellular phone. The speaker and the microphone are removed from the front of the housing of the cellular phone (where a display and operation buttons are mounted) and are placed on the back of the housing, thereby the diameters of the speaker and the microphone are enlarged and thereby wide-range and high-volume-level sound reproduction is realized. The speaker and the microphone are preferably implemented by low-profile flat-panel speakers that are functionally equivalent.
    Type: Application
    Filed: March 15, 2002
    Publication date: September 26, 2002
    Applicant: NEC VIEWTECHNOLOGY, Ltd.
    Inventor: Hitoshi Masamura