Patents by Inventor John W. Totsch

John W. Totsch 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).

  • Magnetic conveyor system for transporting wafers
    Patent number: 4805761
    Abstract: A conveyor system for transporting wafers to and from different work stations in a clean-controlled environment includes a platform being magnetically levitated above a U-shaped rail by a magnetic cushion provided by first magnets on the platform and the rail, the first magnets having their magnetic poles arranged to repel one another. A nonmagnetic tube within which is a free-sliding magnetic piston of the same polarity as the first magnets extends along the center of the track. A second magnet is disposed on the platform such that its polarity will repel (or attract) the piston magnet such that as the pressure differential in the tube is changed the piston magnet slidably moves within the tube and pushes (or draws) the platform along the track with it.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: February 21, 1989
    Inventor: John W. Totsch
  • Body worn video camera transmitter housing
    Patent number: D376146
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: December 3, 1996
    Inventor: John W. Totsch
  • Video camera housing
    Patent number: D377940
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: February 11, 1997
    Inventor: John W. Totsch