| 摘要 |
PROBLEM TO BE SOLVED: To determine whether ice is made or not in an ice making device for making ice by freezing water. SOLUTION: The communication with a wireless tag 1 by electromagnetic wave of first frequency is tried by a communicating means 6, and whether the ice is made or not is determined by a determining means 7 on the basis of the presence or absence of the communication. COPYRIGHT: (C)2007,JPO&INPIT
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