Patents by Inventor Keiichirou Tsuruoka

Keiichirou Tsuruoka 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).

  • Rotary head magnetic recorder/reproducer
    Patent number: 4617598
    Abstract: A helical scanning rotary head type magnetic video recording and reproducing apparatus for recording and reproducing a video signal by two rotary heads having head gap angles which are slightly different from each other and carry out azimuth recording, and for reproducing a still image by two rotary heads having a same head gap angle as that of one of said two rotary heads. When the apparatus is switched from a normal playback mode to a still image playback mode, a magnetic tape is driven at a lower speed than that used during recording and a noise generation section within reproduced signals is detected, and the magnetic tape is stopped after it is allowed to run for a predetermined length of the tape so as to stop the tape at an optimum condition for reproducing a still picture.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: October 14, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keiichirou Tsuruoka, Ryo Minohara