Patents by Inventor Eiichi Shiratori

Eiichi Shiratori 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).

  • Patent number: 4225967
    Abstract: A broadcast acknowledgement method and system wherein a digital information signal, generated in order to indicate the content with regard to a present broadcast program (for example, a commercial broadcast program on television, radio or CATV), is superimposed on the voice signal of said program for broadcast and the composite signal transmitted to the receiving station, where it is processed to retrieve the digital information signal. Thereby, it can be confirmed whether or not the particular program has been broadcast or not.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: September 30, 1980
    Assignee: Fujitsu Limited
    Inventors: Hirohide Miwa, Eiichi Shiratori