Patents Assigned to Quartz Tubing, Inc.
  • Heating coil structures
    Patent number: 5296685
    Abstract: A heating element formed from at least two wires twisted together. The twisted wires are preferably shaped in a helical configuration and mounted within a quartz tube.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: March 22, 1994
    Assignee: Quartz Tubing, Inc.
    Inventors: Norman Burstein, John Stein