Patents by Inventor Howard E. Rosenblum

Howard E. Rosenblum 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).

  • Secure communication system with remote key setting
    Patent number: 4182933
    Abstract: An apparatus for maintaining secure communication between subscribers. A trally located key distribution center, which includes a data processor, is utilized as a source of remotely selected working variables which are utilized to enable secure communication between a plurality of selected subscribers. Each subscriber in the system has a unique variable which identifies him to the data processor, and enables a secure communication with the data processor, which will then provide him with the working variable of the subscriber that he wishes to call. The key distribution center also reiteratively replaces the working variable of the caller, and the called subscriber if desired, each time contact is made with the key distribution center.
    Type: Grant
    Filed: February 14, 1969
    Date of Patent: January 8, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Howard E. Rosenblum