Patent classifications
H
ELECTRICITY
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H05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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H05B
ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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H05B3/20
Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater
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H05B3/34
flexible, e.g. heating nets or webs
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H05B3/36
heating conductor embedded in insulating material
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