Patents by Inventor William Duncan Wood

William Duncan Wood 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).

  • Compact Respiratory Protective Device
    Publication number: 20160220853
    Abstract: A compact respiratory protective device fitted with a mouthpiece or mouthpiece assembly that retracts, pivots or rotates into the depth of the device to reduce size when packed. This reduction in size also permits the depth of the downstream air channel to be increased while still producing a compact device. This increase in the depth of the downstream air channel maximizes the efficiency and capacity of the filter assembly and reduces the inhalation resistance of the device. The reduced breathing resistance enhances usability.
    Type: Application
    Filed: January 8, 2016
    Publication date: August 4, 2016
    Inventors: William Duncan Wood, Robin Middlemass Howie
  • COMPACT RESPIRATORY PROTECTIVE DEVICE
    Publication number: 20120298103
    Abstract: A compact respiratory protective device fitted with a mouthpiece or mouthpiece assembly that retracts, pivots or rotates into the depth of the device to reduce size when packed. This reduction in size also permits the depth of the downstream air channel to be increased while still producing a compact device. This increase in the depth of the downstream air channel maximizes the efficiency and capacity of the filter assembly and reduces the inhalation resistance of the device. The reduced breathing resistance enhances usability.
    Type: Application
    Filed: January 24, 2011
    Publication date: November 29, 2012
    Inventors: William Duncan Wood, Robin Middlemass Howie