Patents by Inventor Yahuhiro Yusa

Yahuhiro Yusa 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: 4463388
    Abstract: An apparatus reproduces signals which are recorded on a rotary medium having a main information signal recorded on a spiral main track, with first and second tracking control reference signals which are recorded on sub-tracks positioned between adjacent main tracks. A third tracking control reference signal is recorded on the main or sub-track, on each track turn, during an interval corresponding to the vertical synchronizing signal, within a vertical blanking period of the main information signal. The first and second reference signals are recorded within an interval excluding the interval corresponding to that of the vertical synchronizing signal. A kick pulse is generated for shifting the reproducing element to an adjacent track during a special reproduction mode so that the reproducing element is shifted at an interval other than the interval in which the reproducing element reproduces the vertical synchronizing signal.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: July 31, 1984
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hiroyuki Sugiyama, Ryozo Abe, Masaki Sakurai, Yahuhiro Yusa, Kenji Yoshihara