78826551
Mar 1, 2006
Jul 29, 2008
Visual freezable liquid indicators for indicating freeze and non-freeze temperature conditions inside of electric freezers, electric coolers, and inside of non-electric coolers; visual temperature change indicator for detecting power outages and power interruptions to electric freezers and electric coolers that are used to store perishables, namely, food, beverages, bait and tackle, blood, medicines; the indicator being useful for determining spoilage
Electrical and Scientific Apparatus