Patents by Inventor Shiro Enami

Shiro Enami 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).

  • Cross-point switch matrix and multistage switching network using the same
    Patent number: 4068215
    Abstract: A plurality of cross-point matrices each having a plurality of holding circuits respectively associated with a corresponding cross point are arranged in multiple stages, which are linked with each other to form a multi-stage switching network. Each switch matrix is provided with an associated NAND gate connected to gates capable of being selectively impressed with the signals representing the state of the holding circuits in a row or column within the particular switch matrix. The output of the NAND gate is connected to an OR gate for each stage.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: January 10, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Takuji Mukaemachi, Shiro Enami