Patents by Inventor Patrick N. Keller

Patrick N. Keller 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).

  • Process of making a nematic elastomer fiber with mechanical properties of a muscle
    Patent number: 8105519
    Abstract: A method of making a liquid crystalline fiber is disclosed. A copolymer having a liquid crystalline side group and a crosslinking side group is crosslinked. A fiber of the crosslinking copolymer is drawn before the crosslinking reaction is complete.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: January 31, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jawad Naciri, Hong Jeon, Patrick N Keller, Banahalli R Ratna
  • Nematic elastomer fiber with mechanical properties of a muscle
    Patent number: 7794834
    Abstract: A method of making a liquid crystalline fiber is disclosed. A copolymer having a liquid crystalline side group and a crosslinking side group is crosslinked. A fiber of the crosslinking copolymer is drawn before the crosslinking reaction is complete.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: September 14, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jawad Naciri, Hong Jeon, Patrick N Keller, Banahalli R Ratna
  • Video multiplexer
    Patent number: 4517593
    Abstract: An event scoring apparatus using a video multiplexer and method are created y using a plurality of video cameras to cover limited fields of view of a given area. The cameras are distributed to cover the area. The video output of the cameras is used as input to a video multiplex circuit which multiplexes the camera video signals to form a composite signal containing the desirable information from each camera and generated the sync signal for the slave camera. By counting horizontal lines of video and video sync levels, selected lines of video are combined to form a composite video image. The composite video image permits both a target and a strike event to be recorded in at least two locations within the composite video. A scoring systems inputs the multiplexer output to determine the miss distance and direction from the target. A programmable read only memory permits one of the camera video inputs to be a gray level which is inserted between consecutive camera lines of actual real time video signal.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: May 14, 1985
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Patrick N. Keller, Clinton D. Seal
  • Laser formed video tube calibration markers
    Patent number: 4417123
    Abstract: An apparatus for forming fiducial marks on an imaging surface of a video e comprising a laser system that outputs an alignment focused beam and a pulsed focused beam upon command, a driven jig positioner that holds and moves the video tube, a controller programmed to move the jig in a predetermined manner so that fiducial marks are formed on the tube in a desired pattern, and video monitoring means for observing said focused beams on the imaging surface.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: November 22, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Patrick N. Keller, Jerome B. Franck, George G. Silberberg
  • Phase controlled shuttering system with selectable shuttered and unshuttered modes
    Patent number: 4301476
    Abstract: A shutter for an electro-cinematographic camera has synchronizing provisions to make high-speed exposures during the retrace interval of associated viewing equipment. Provision is also made for rapid change to unshuttered operation without use of a monitor by a positive lock mechanism.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: November 17, 1981
    Inventors: Patrick N. Keller, Leon G. Biesiadecki