Patents by Inventor Stephen W. Leibholz

Stephen W. Leibholz 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).

  • Signal encoding/decoding employing quasi-random sampling
    Patent number: 4903021
    Abstract: A signal transmission system and method is provided in which analog signals are sampled quasi-randomly and the samples stored. The samples are thereafter retrieved with an equal interval between them and transmitted. At the receiver, the transmitted samples are stored, decoded and reconstituted with the original quasi-random sample interval therebetween. The transmission system and method permits the faithful capture and transmission of signals across bandwidth limited transmission systems even though such signals lie outside that bandwidth.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: February 20, 1990
    Inventor: Stephen W. Leibholz
  • Encrypting transponder
    Patent number: 4783798
    Abstract: An encrypting transponder provides data security for transmissions between a terminal and a remote computer, network or terminal. The transponder provides positive user and terminal identification before access to a remote computer file is permitted, and further provides for secure message authentication during the course of data transmission. The transponder is passive and operates in response to interrogation from a remote host computer, thus making it useful with many different operating system and hand-shake protocols.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: November 8, 1988
    Assignee: ACS Communications Systems, Inc.
    Inventors: Stephen W. Leibholz, Samuel D. Epstein