Patents by Inventor Ryuuzi Usami

Ryuuzi Usami 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).

  • Electronic musical instrument
    Patent number: 4630518
    Abstract: Melody data stored in a memory is sequentially read out and sounded with the operation of a one-key switch. In the memory is also stored accompaniment data, which is automatically played under the control of a microprocessor. The timing of the operation of the switch for the melody is compared to the normal timing of the piece. If the difference between the two compared timings is less than .DELTA.t, the accompaniment is automatically played at a normal timing. If it is greater than .DELTA.t, the tempo of the accompaniment is corrected.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: December 23, 1986
    Assignee: Casio Computer Co., Ltd.
    Inventor: Ryuuzi Usami
  • Automatic music playing apparatus
    Patent number: 4614983
    Abstract: In an automatic music playing apparatus, musical data entered at a keyboard are temporarily stored in a RAM and are sequentially recorded on a magnetic tape. The RAM has a memory capacity larger than the longest musical data to be recorded on the magnetic tape and has memory areas which are all accessed by a CPU. The musical data is then recorded in a predetermined data area on the magnetic tape.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: September 30, 1986
    Assignee: Casio Computer Co., Ltd.
    Inventor: Ryuuzi Usami