Patents by Inventor Katsumi Sera

Katsumi Sera 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).

  • Still picture recording system with noise detection and frame counting during shift from reproduction of picture in motion to reproduction of still picture including an intermediate slow motion mode
    Patent number: 4737864
    Abstract: A still picture reproducing system for a magnetic recording and reproducing apparatus is disclosed. The system sends one frame in order to shift a reproduction mode from ordinary reproduction to reproduction of a still picture by use of so-called "fine slow", sends one more frame if a noise is detected on a picture at this time, and stops if no noise is detected.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: April 12, 1988
    Assignees: Hitachi Microcomputer Eng. Co., Hitachi Video Eng., Hitachi Ltd.
    Inventors: Masataka Sekiya, Hideo Nishijima, Kaneyuki Okamoto, Isao Fukushima, Fumiaki Fujii, Katsumi Sera, Takashi Furutani
  • Motor driving circuit
    Patent number: 4494056
    Abstract: A motor driving circuit in which the opposite ends of the motor driving coils of a video tape recorder (VTR) capstan motor are shorted by a group of switching elements when a control input voltage generated from a rotation detection/oscillator is in a predetermined range.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: January 15, 1985
    Assignees: Hitachi, Ltd., Hitachi Microcomputer Engineering, Ltd.
    Inventors: Hideo Nishijima, Katsumi Sera, Isao Fukushima, Yasunori Kobori