ELECTRIC HEATING CONTANT TEMPERATURE LUNCH BOX

ELECTRIC HEATING CONTANT TEMPERATURE LUNCH BOX

  • CN 87,215,952 U
  • Filed: 12/07/1987
  • Issued: 12/07/1988
  • Est. Priority Date: 12/07/1987
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of electrical heating lunch box is made up of box body, lid and heating, it is characterized in that described heating is a PTC semiconductive ceramic electric heating element, and electric heating element is positioned at the inside of described box body bottom protrusion part.

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