Patents by Inventor Alfred G. Rockman

Alfred G. Rockman 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).

  • Patent number: 5360235
    Abstract: An optical marking system in which objects are coated with materials for purposes of applying secretly coded marks on the objects. The coating materials are transparent in daylight and have the property of absorbing ultraviolet light. When such materials are applied to a portion of the surface of an object which is a good ultraviolet reflector, only the uncoated portion reflects ultraviolet. Thus, the marked object is therefore seen as having the coated portion blocked-out when viewed through a device which filters out all but ultraviolet wavelengths but appears to be unmarked when observed without the viewing device. Similar coding of objects may be achieved by appropriately selected paints, papers and other materials.
    Type: Grant
    Filed: November 1, 1969
    Date of Patent: November 1, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Louis F. Drummeter, Gordon L. Stamm, Gerald E. Rohl, Alfred G. Rockman