Patents by Inventor Takehiko Kawada

Takehiko Kawada 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).

  • Drive control circuit for d.c. motor
    Patent number: 4080555
    Abstract: The rotation of a motor is controlled to maintain a standard frequency from a standard frequency generator in synchronism with the frequency of a tachogenerator which is associated with the d.c. motor. In order to prevent the motor rotation from being stabilized at a number of revolutions other than a predetermined number of revolutions, there are provided an acceleration circuit and a stop circuit for forcedly controlling the motor rotation at the predetermined number of revolutions.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: March 21, 1978
    Assignee: Denki Onkyo Co., Ltd.
    Inventors: Takehiko Kawada, Moriaki Toyoda
  • Cassette tape recorder with tape pad
    Patent number: 4011592
    Abstract: A cassette tape recorder includes a tape pad which is mounted in an upright position in the recorder for insertion into a wall opening in a tape cassette so as to cause a satisfactory pressure engagement of a magnetic tape therein with a magnetic head which is to be inserted into a window other than a central window of the tape cassette during a record or playback operation, thus improving a record and/or playback response.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: March 8, 1977
    Assignee: Denki Onkyo Company, Ltd.
    Inventor: Takehiko Kawada