Patents by Inventor Glenn Gordon Marshall

Glenn Gordon Marshall 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).

  • Dust withdrawal arrangement
    Patent number: 6857161
    Abstract: A dust withdrawing arrangement has a plurality of individual enclosures each enclosing a respective one of working areas from which dust has to be removed, a common enclosure which is arranged around said individual enclosures, a negative pressure generating unit for generating a negative pressure in an interior of the common enclosure, and a passage associated with each of the individual enclosures and leading exclusively to the interior of the common enclosure without communicating with passages from other individual enclosures.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: February 22, 2005
    Inventor: Glenn Gordon Marshall
  • Dust withdrawal arrangement
    Publication number: 20030135951
    Abstract: A dust withdrawing arrangement has a plurality of individual enclosures each enclosing a respective one of working areas from which dust has to be removed, a common enclosure which is arranged around said individual enclosures, a negative pressure generating unit for generating a negative pressure in an interior of the common enclosure, and a passage associated with each of the individual enclosures and leading exclusively to the interior of the common enclosure without communicating with passages from other individual enclosures.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 24, 2003
    Inventor: Glenn Gordon Marshall