HEATING FORMS Russian patent published in 1994 - IPC

Abstract RU 2021446 C1

FIELD: building materials. SUBSTANCE: heating forms have flat deck, hollow stiffening ribs, spirals of heating wire, electric insulating shell, warmth-keeping member, protective casing, partitions, fasteners of spiral with rib. EFFECT: higher efficiency. 3 cl, 2 dwg

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RU 2 021 446 C1

Authors

Zubkov V.I.

Gunenko N.A.

Dates

1994-10-15—Published

1991-04-30—Filed