TEA-KETTLE COOKING-KETTLE
US 298465 A US 525924 A
Ivoet W. Hablow, 1884 Belle C. Saein, 1894
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TEA-KETTLE KETTLE.
US 636805 A US 908285 A
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TEA-KETTLE KETTLE.
US 636805 A US 908285 A
Frederick S Hunt, 1899 Robert B Lewis, 1907
V. Lorenzo Porcelli, 1989 Tajinder Singh Lamba, 2004
INTELLIGENT ELECTRIC KETTLE
US 8405004 B2
Wing Chung Li, 2013