Patents by Inventor Robert F. Sims

Robert F. Sims 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 of manufacture
    Patent number: 5122311
    Abstract: In a method of manufacturing a member having a cross-sectional area which varies along its length, the member is produced by filling a cavity 6 in a die 5 with powdered material and compressing it. The die includes portions 8, 9 and 10 at different heights around the opening 7 so as to enable the amount of powdered present in the cavity to be varied along its length without compromising the shape of the final item to be manufactured.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: June 16, 1992
    Assignee: Marconi Electronic Devices Limited
    Inventors: Robert F. Sims, Keith B. Lyons