Patents by Inventor Ryuji Yano

Ryuji Yano 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).

  • Magnetic bubble memory apparatus
    Patent number: 4495601
    Abstract: In a magnetic bubble memory apparatus of cassette type comprising a magnetic bubble memory device and a signal detector contained in a cassette, the memory device and the signal detector are surrounded by a grounded shield made of electroconductive material.
    Type: Grant
    Filed: March 10, 1982
    Date of Patent: January 22, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Tadaaki Etoh, Ryuji Yano, Kazuhiro Ishida, Shoji Yoshimoto
  • Magnetic bubble memory device
    Patent number: 4471468
    Abstract: A magnetic bubble memory device has a plurality of memory loops which comprise minor loops and a map loop arranged independently of the minor loops. The map loop stores index data and parameter data of the memory chip. By detecting the index data, parameter data addresses are designated, and required parameter data are read out and stored in parameter memories, respectively, so as to allow operation of magnetic bubble memory chips having different storage capacities and different parameters under control of a single control circuit.
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: September 11, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Kazutoshi Yoshida, Ryuji Yano
  • Pulse generating circuit with clock pulse ceasing feature
    Patent number: 4352995
    Abstract: A pulse generating circuit in ises a clock ceasing detecting circuit and a logic circuit which receives the output of one of the decoders and the output of the detecting circuit. The flip-flop circuit is cleared by the output of the detecting circuit through the logic circuit when the clock signal is ceased by accident.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: October 5, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Kazutoshi Yoshida, Ryuji Yano, Kazuhiro Ishida