Patents by Inventor Donald L. Keehn

Donald L. Keehn 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: 5909315
    Abstract: A display filter having a secure apparatus comprised of spring loaded gripping members for attaching a bezel having a filter medium onto a notebook computer. Gripping members grasp the sides of the notebook computer and the springs exert force sufficient to hold the display filter at a desired location. Further more, the display filter is horizontally adjustable so that the filter medium may be centered over the notebook computer display. When not used on a notebook computer display, the display filter may be stored in a relatively flat form factor by rotating the gripping members such that the protrusions used to grip the side of a notebook computer case may be rotated so that they lay flat against the side of a bezel. In this manner, there are no protruding edges and overall bulk is minimized. Other ways of attachment include the use of L-shaped strip members that are adjustable with respect to the bezel that contain the filter medium.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: June 1, 1999
    Assignee: Optical Coating Laboratory, Inc.
    Inventor: Donald L. Keehn
  • Patent number: 5852513
    Abstract: The present invention relates to an optical filter including a flexible, transparent substrate coated with a novel combination of optical coatings, and a frame system designed for mounting the optical filter to a television or other visual display screen. A neutral density contrast enhancement is included within the composition of a flexible substrate, or is coated on either the front, the rear, or both of the surfaces of the substrate. A silicone anti-glare hardcoat is applied to both the front and rear surfaces of the substrate. An anti-reflection coating is added to the front surface of the substrate, preferably via sputtering, and designed to reflect a specific color at a preferred brightness measurement. The combination of a front surface anti-reflection coating, front and rear surface anti-glare coatings, and a neutral density contrast enhancement, eliminates the need for an anti-reflection coating on the rear surface of the substrate.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: December 22, 1998
    Assignee: Optical Coating Laboratory, Inc.
    Inventors: James D. McDole, Donald L. Keehn, John Morse Huish, Orville Larry Creech, Jr.
  • Patent number: 5803424
    Abstract: An adjustable hanger for mounting an article such as an anti-glare filter or electromagnetic shield or other cover on a second article such as a computer monitor. The hanger has an L configuration defined by two legs, a first one of which extends along the side/front of the monitor and the second of which rests on, i.e., is supported on, the top surface of the monitor. In a top mounting embodiment, the first leg of the hanger attaches to the top of the filter. A side mounting version preferably uses two hangers, which attach to opposite sides of the filter. The second or top leg preferably has a high-friction bottom surface or pad for providing non-slip positioning on the monitor. The depending leg includes a clamp or enclosure which mounts on the cover's bezel, providing ease of mounting on and removal from the cover. The relative size and configuration of the clamp and bezel can be selected to provide a secure fit. In one embodiment, the clamp provides an interference fit with the bezel.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: September 8, 1998
    Assignee: Optical Coating Laboratory, Inc.
    Inventors: Donald L. Keehn, David L. Soberanis
  • Patent number: 5155627
    Abstract: An optical screen or cover for computer monitors and other video displays comprises a frame to which is mounted an optical plate such as an anti-glare screen, and a concave, U-shaped lip which is mounted to the rear of the frame along three sides of the frame. The lip slides onto and off the monitor for mounting and removing the cover. Also, the lip adapts to monitors of different sizes and provides a snug, custom-appearing fit.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: October 13, 1992
    Assignee: Optical Coating Laboratory, Inc.
    Inventors: Donald L. Keehn, David L. Soberanis, Russell E. Barbaria