Patent classifications
G
PHYSICS
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G05
CONTROLLING; REGULATING
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G05D
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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G05D23/19
characterised by the use of electric means
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G05D23/275
with sensing element expanding, contracting, or fusing in response to changes of temperature
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G05D23/27535
Details of the sensing element
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G05D23/27541
using expansible solid
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