Patents by Inventor Albert J. Warren

Albert J. Warren 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).

  • Portable hydraulic classifier
    Patent number: 6799681
    Abstract: A portable hydraulic classifier (10) for mining gold from stream beds wherein the hydraulic classifier (10) includes a lower sluice unit (11) hingedly connected to an upper sluice unit (12) equipped with a water supply unit (14) and a support unit (13) adapted to allow angular adjustment of the upper sluice unit (12) relative to the lower sluice unit (11) wherein the support unit (13) further includes a pair of support leg assemblies (40) (40′) wherein at least one of the support leg assemblies (40) is provided with a cross-piece element (43) that serves as a handle for transporting the hydraulic classifier (10).
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: October 5, 2004
    Inventor: Albert J. Warren