Patents by Inventor John Graham Richings

John Graham Richings 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).

  • Switching arrangements
    Patent number: 3982212
    Abstract: A switching arrangement for use at very high frequencies (gigahertz) consists of a number of four port microstrip switches interconnected to provide a versatile routing matrix. The use of P.I.N. diodes in each switch provides low insertion loss and also high isolation between different routes. The arrangement can be made in a very compact form.
    Type: Grant
    Filed: May 2, 1975
    Date of Patent: September 21, 1976
    Assignee: The Marconi Company Limited
    Inventors: John Richard Wallington, John Graham Richings