Patents by Inventor Yoshiaki Yato

Yoshiaki Yato 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).

  • Frequency converter
    Patent number: 4885746
    Abstract: A stuff (or dummy) pulse and a stuff designation pulse which indicates existence of nonexistence of the dummy pulse are inserted in a multiplexed pulse code modulation signal to convert an input signal frequency to a higher frequency. The frame synchronization pulse is used as the stuff designation pulse. Therefore, stuff designation is possible even when the frequency difference between the input signal frequency and output signal frequency is small.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: December 5, 1989
    Assignee: Fujitsu Limited
    Inventors: Takeo Fukushima, Masami Mizuguchi, Takahiro Furukawa, Yoshiaki Yato, Kenji Sato, Naonobu Fujimoto, Tetsuro Murase
  • Hierarchical data transmission system
    Patent number: 4811341
    Abstract: A hierarchical data transmission system outputs a high speed second data train by step-by-step multiplexing a plurality of first data trains. A first signal processing part operates at the processing speed corresponding to the first data train, a third signal processing part operates at the processing speed corresponding to the second data train, and a second signal processing part operates at the processing speed corresponding to the intermediate speed of the first data train and second data train.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: March 7, 1989
    Assignee: Fujitsu Limited
    Inventors: Naonobu Fujimoto, Takashi Yorita, Yoshiaki Yato, Yoshinori Nakamura, Kenji Satoh
  • Multiplex system for replacing a faulty multiplexer output with an alternating pattern signal
    Patent number: 4754456
    Abstract: A Multiplex system for further multiplexing signals output by low group multiplexers by means of a high group multiplexer. In this system, when at least one of the low group multiplexers is in a fault state, an alternating pattern signal is supplied to the high group multiplexer instead of the signal output by the faulty low group multiplexer, whereby the ratio of "0" and "1" of the signal output by the high group multiplexer becomes almost 1:1.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: June 28, 1988
    Assignee: Fujitsu Limited
    Inventors: Yoshiaki Yato, Takeo Fukushima, Naonobu Fujimoto
  • Radar data selection equipment
    Patent number: 3975730
    Abstract: A radar data selection equipment comprising: a quantizer for quantizing analog data supplied from a radar, a target data detector for detecting target data according to the signal quantized by the quantizer, a gate disposed between the target data detector and a follow-up computer capable of inhibiting the output of specific signals among the data from the radar, and a data quantity monitor for detecting the quantity of signals supplied from the target data detector and transmitting to the gate a control command to cause the gate to inhibit the output of the specific signals when the quantity of the signals detected exceeds a predetermined set value.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: August 17, 1976
    Assignees: Nippon Telegraph and Telephone Public Corporation, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takamasa Maeda, Yasuhiko Kamata, Shyozo Shimaya, Taiji Tatsuta, Takamasa Yamashita, Hiromi Kawakami, Takeshi Matsuki, Yoshiaki Yato, Michinori Yokouchi, Takeshi Kijima