Created page with "Siemens Elektrogeräte GmbH obtained a patent on May 30, 1973 for an "Electric cooking oven with pyrolytic self-cleaning" invented by Josef Ackermann.<ref>The German Patent an..."
(Created page with "Siemens Elektrogeräte GmbH obtained a patent on May 30, 1973 for an "Electric cooking oven with pyrolytic self-cleaning" invented by Josef Ackermann.<ref>The German Patent an...")