Patents by Inventor David J. Welch

David J. Welch 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).

  • Publication number: 20080289780
    Abstract: The present invention is an insect screen with improved durability designed to serve the primary purpose of keeping out very small insects and pests while maximizing visual clarity, light transmission, and airflow. The insect screen is free from macroscopic permanent deformation when subjected to a blunt instrument deformation test of at least 5 lbs. and has a total light transmission of at least 65%. The inventive insect screen comprises fibers in a warp and fill construction which define openings having a warp dimension and a fill dimension, both of said warp and fill dimensions being equal to or less than about 0.06 inches and equal to or larger than about 0.01 inches, the fibers having a diameter less than about 0.007 inches.
    Type: Application
    Filed: August 7, 2008
    Publication date: November 27, 2008
    Inventors: Gordon L. McGregor, Thomas R. Bugg, David J. Welch
  • Publication number: 20040203303
    Abstract: The present invention is an insect screen with improved durability designed to serve the primary purpose of keeping out very small insects and pests while maximizing visual clarity, light transmission, and airflow. The insect screen is free from macroscopic permanent deformation when subjected to a blunt instrument deformation test of at least 5 lbs. and has a total light transmission of at least 65%. The inventive insect screen comprises fibers in a warp and fill construction which define openings having a warp dimension and a fill dimension, both of said warp and fill dimensions being equal to or less than about 0.06 inches and equal to or larger than about 0.01 inches, the fibers having a diameter less than about 0.007 inches.
    Type: Application
    Filed: February 13, 2004
    Publication date: October 14, 2004
    Inventors: Gordon L. McGregor, Thomas R. Bugg, David J. Welch
  • Publication number: 20040192129
    Abstract: An insect screen made from fibers in a warp and fill construction defining openings having a warp dimension and a fill dimension, both of said warp and fill dimensions being equal to or less than about 0.04 inches and equal to or larger than about 0.01 inches, said fibers having a diameter of equal to or greater than about 0.002 inches and less than about 0.007 inches. The present invention is an improved insect screen designed to serve the primary purpose of keeping out very small insects and pests while maximizing visual clarity, light transmission, and airflow.
    Type: Application
    Filed: September 30, 2003
    Publication date: September 30, 2004
    Inventors: Gordon L. McGregor, Thomas R. Bugg, David J. Welch
  • Patent number: 5914976
    Abstract: An optoelectronic module includes one or more VCSEL transmitters and/or photodetectors coincidentally aligned along a common central longitudinal axis. Differing wavelengths of light can be received and transmitted by the optoelectronic module optically coupled to a single optical fiber or in a free-space link. The optoelectronic module is able to receive two wavelengths and transmit one wavelength, or can transmit two wavelengths in the optical link. The VCSEL transmitter can be optically pumped by a vertically integrated pump VCSEL. A parallel optical link supports transmission and reception for each duplex channel on a single optical fiber.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: June 22, 1999
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Vijaysekhar Jayaraman, David J. Welch