Patents by Inventor Toshinari Kunieda

Toshinari Kunieda 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).

  • Digital signal transmission system having frame synchronization operation
    Patent number: 4849995
    Abstract: A digital signal transmission system includes a synchronization pattern detection circuit for detecting a synchronization pattern in response to a received transmitted digital signal, a pseudo synchronization detection circuit for detecting a pseudo synchronization pattern in the form of cyclic redundancy code in response to a received transmitted digital signal, and a synchronization protection circuit for counting the synchronization pattern detection signals produced when synchronization patterns are detected in response to a synchronization pattern detection signal from the synchronization pattern detection circuit. The synchronization protection circuit includes a main synchronization counter circuit and an auxiliary synchronization counter circuit. The count of protection steps for the confirmation of synchronization recovery of the auxiliary synchronization counter circuit in accordance with synchronization or asynchronization of the main synchronization counter circuit is variable.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: July 18, 1989
    Assignees: Fujitsu Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Hiroshi Takeo, Masanori Kajiwara, Michinobu Ohhata, Takao Moriya, Satoshi Takeda, Hiroshi Nakaide, Hiroshi Yamasaki, Toshinari Kunieda, Ikuo Washiyama