Patents by Inventor Tsuyoshi Usagawa

Tsuyoshi Usagawa 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).

  • Apparatus and method for signal separation and recording medium for the same
    Patent number: 6704369
    Abstract: A signal separation apparatus is capable of extracting original signals of two different systems with a high quality from received signals containing the original signals superposed each other in the course of transmission. In signal transmission from senders to receiver equipment, the signals to be sent separately are susceptible to mutual interference and superposition with given amplification factors in the course of transmission through respective transmission channels to such an extent that these signals can no more be discerned from each other by a receiver.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: March 9, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naoto Kawasaki, Hirokazu Shimada, Tsuyoshi Usagawa, Yasuyuki Shimada, Masanao Ebata