Patents by Inventor Tsunehiko Nagasawa

Tsunehiko Nagasawa 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).

  • Patent number: 4519008
    Abstract: A method of recording visual information such as words of a song in an audio recording medium and reproducing the same is provided. Picture information obtained through a TV camera is quantized into pulse signals. Using these pulse signals, a sine wave signal having an audio frequency band is modulated. Further, synchronizing signals are added to the modulated signal at predetermined intervals to form a character signal. Said character signal is recorded in one of the two channels of an audio recording medium where as a musical accompaniment is recorded in another channel. When played, such character signal is reproduced on a display screen such that a user can read the words to sing the song to the simultaneously reproduced accompaniment.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: May 21, 1985
    Assignee: Toshiba-EMI Limited
    Inventors: Tsutomu Takenouchi, Tsunehiko Nagasawa, Masatada Nanasawa