Patents by Inventor Harold E. Vickerman

Harold E. Vickerman 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: 5348480
    Abstract: A statistical sampling apparatus is formed with a box-like enclosure having transparent top, front and bottom walls. A stationary ledge extends in a plane between the top and bottom wails and stops short of the front wall so that there is a space that communicates between the volume below the ledge and the volume above the ledge. A plurality of identically shaped beads are disposed within the enclosure. The upper surface of the ledge has a patterned array of identical recesses which receive certain of the beads when the enclosure is up-ended and the beads are allowed to wash over the ledge. The beads are of different colors in a known distribution, and the patterned array of recesses is divided into series of a smaller numbers of recesses for statistical sampling purposes.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: September 20, 1994
    Inventor: Harold E. Vickerman