Patents Assigned to Firma Elektro-Warme-Technik Siegfried Petz
  • Heater
    Patent number: D248043
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: May 30, 1978
    Assignee: Firma Elektro-Warme-Technik Siegfried Petz
    Inventor: Hans-Ulrich Schade