Patents by Inventor Lars Thrane

Lars Thrane 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).

  • Method for cryptographic transmission of speech signals and a communication station for performing the method
    Patent number: 4856061
    Abstract: In a communication system, in which a great number of communication stations operate on the same telecommunication channel, such as a radio frequency, secret information transfer for selective calls as well as group calls is secured by cryptographic transmission of speech signals, in which enciphering and deciphering of the speech signals in transmitting and receiving stations, respectively, are performed by means of a secret binary transformation code associated selectively with the speech communication in question.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: August 8, 1989
    Assignee: S.P. Radio A/S
    Inventor: Lars Thrane