Patents by Inventor Robert J. Bulmer

Robert J. Bulmer 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).

  • Underwater acoustic pressure release reflector
    Patent number: 4090171
    Abstract: 1. An underwater acoustic reflector for use at elevated hydrostatic press comprising:(A) a plurality of thin paper laminae assembled in an integrated stack wherein all the paper laminae run in essentially the same direction,(B) a thin-walled gas confining wrapping intimately surrounding and enclosing said stack of paper, and(C) a waterproof jacket enclosing said wrapped stack of paper and being of a material having characteristic acoustic impedance approximately the same as that of seawater enclosing said wrapped paper.
    Type: Grant
    Filed: February 18, 1963
    Date of Patent: May 16, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert J. Bulmer, Edwin J. Parssinen