Patents by Inventor John Michael Schmidt

John Michael Schmidt 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).

  • Spiral antenna absorber system
    Patent number: 4085406
    Abstract: The radiation absorber system of a unidirectional spiral antenna is provided with a laterally transverse variable radiation absorption density characteristic to control the absolute gain with frequency pattern, i.e. absolute gain versus frequency characteristic, of the antenna.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: April 18, 1978
    Assignee: International Business Machines Corporation
    Inventors: John Michael Schmidt, Wallace Leon Snow