Patents by Inventor John Francis Pollard

John Francis Pollard 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).

  • Waveguide to co-axial line junctions
    Patent number: 3986148
    Abstract: A co-axial line to waveguide junction is formed from a length of waveguide with a co-axial line section along the length with the center conductor of the co-axial line entering the interior of the waveguide length. Connecting means are provided at each end of the length to enable connection of selectably short circuiting means. When any of the short circuiting means is in the short circuited state, a path is created between the co-axial line section and the other end of the waveguide length.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: October 12, 1976
    Assignee: English Electric Valve Company Limited
    Inventor: John Francis Pollard