Patents by Inventor David Houldridge

David Houldridge 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).

  • Compression device
    Patent number: 6152893
    Abstract: A compression device for applying a predetermined compression to a limb including a pliable non-extensible sheet, co-operating fastening parts and a mechanism for indicating changes in compression.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: November 28, 2000
    Assignee: Smith & Nephew PLC
    Inventors: William Pigg, David Houldridge
  • Surgical dressing
    Patent number: 5633007
    Abstract: An adhesive dressing suitable for moist wounds includes a first layer comprising a substrate having a layer of pressure sensitive adhesive on a wound facing surface and a second layer comprising a moisture vapour permeable continuous film. The second layer is attached to the non wound facing surface of the first layer at spaced apart intervals thereby to form a plurality of discrete cellular voids between said first and second layers. The first layer has apertures therein to allow passage of liquids therethrough into the cellular voids and total area of the dressing defined by the cellular voids is from 20% to 80% of the total operable area of the dressing.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: May 27, 1997
    Assignee: Smith & Nephew PLC
    Inventors: Julian Webb, Christopher I. Reed, Mark F. Smith, David F. Farrar, Patrick L. Blott, David Houldridge, Anna F. MacFarlane, Selvarajah Sivshanker