Patents by Inventor Martin J. Kelly, Jr.

Martin J. Kelly, Jr. 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).

  • Apparatus for use in drilling a well at an offshore location
    Patent number: 4987956
    Abstract: Apparatus is disclosed for use in drilling an offshore well wherein a drill string suspended from a drill ship for extension within a riser pipe, lower marine riser package and subsea wellhead including a blowout preventer stack may be sheared at a location intermediate the lower end of the riser pipe and a flex or ball joint of the riser package.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: January 29, 1991
    Inventors: Asger Hansen, Martin J. Kelly, Jr.
  • Detection of defects in a circular or spiral diffraction grating
    Patent number: 4541716
    Abstract: Topographical defect detecting apparatus and process for optically inspecting a circular or spiral track surface defining a diffraction grating such as exists on a video disc or optical disc record. Light from a substantially point source illuminates the track surface. Diffracted reflections from the surface are viewed by the human eye with or without the aid of a TV camera and monitor.Non-uniformities in track spacing and deviation from average surface flatness are readily observable.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: September 17, 1985
    Assignee: RCA Corporation
    Inventors: Horatio N. Crooks, Martin J. Kelly, Jr.