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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Heater') ORDER BY date ASC, patent, type

Total of 1 patents found where: Category is 'Heater';

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T / S Patent Date Description Patentee Category Assigned To
 1900
U 657,574 September 11, 1900 High Voltage Insulator
Heater (electric) imbedded in insulator body		 SINDING-LARSEN, Alf
 Heater  

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