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| Number | Title | Issue Date |
| 5916466 | Space heater with element supports A heating apparatus for an enclosure including at least a ceiling and a side wall, the apparatus includes a plurality of electrical resistance heating wires or sections of electrical resistance heating wire, and support means therefor. The support means i... | 06/29/1999 |
| 5053743 | High voltage spiral resistor A resistor constituted by a spiral region (4) of a second conductivity type and having a determined doping level, formed on a first surface of a semiconductor substrate (1) of the first conductivity type, having a first terminal on the first surface of th... | 10/01/1991 |
| 4649368 | Electrical resistance heating element A resistance heating element of the ribbon type for use in a high temperature electric furnace. The element has the same curved cross-sectional configuration throughout its entire length to give it strength and stiffness and permits the element to be bent... | 03/10/1987 |
| 4641010 | Battery powered electric hair curler An electric hair curler comprises a handle and a barrel connected thereto for winding thereabout the hair. The barrel is provided with an electric heater for curling the hair wound on the barrel. The heater includes a plurality of resistor elements in the... | 02/03/1987 |
| 4575619 | Electrical heating unit with serpentine heating element A heating unit combining a block of thermal and electrical insulating material and an electrical resistance element in which the block contains a mass of ceramic fibers bound together and has an elongated slot with confronting walls rising to the surface ... | 03/11/1986 |
| 4450347 | Heating body This heating body is cut from a metal sheet (1) and defined by slots (2) obtained by punch stamping on a support (4) of plastics foam. The opposite edges of these slots (2) are spaced from one another by deformation of the portion of the conductor (7) adj... | 05/22/1984 |
| 4429214 | Electrical heating panel A gypsum wallboard with electrical heating wire disposed in grooves arranged to minimize tendencies for the board to crack when lifted by the two opposite board ends.... | 01/31/1984 |
| 4415798 | Plate for radiant heating or similar effects A radiant heater for heating the surrounding environment or for transferring heat therein to a remote location. In one embodiment the radiant heater comprises a plate provided with a series of interconnecting grooves in the surface thereof. Disposed in th... | 11/15/1983 |
| 4292504 | Expanded metal electric heating element with edge support An electric resistance heating unit in which the heating element is a thin, foil-like strip of expanded metal supported on edge substantially along its entire length on a board of insulating material. The heating element is formed in a serpentine pattern,... | 09/29/1981 |
| 4249069 | Flask heater assembly A flask heater assembly for spherical bodied, boiling flasks in which a block is hollowed to receive the flask body and a ribbon of electrical resistance heated, flexible metal is folded into an elongated band and bent and fitted into the hollow to confor... | 02/03/1981 |
| 4081657 | Electrically heated roof drip edge strip A drip edge strip for a shingled roof is tapered and includes a first portion to be secured to the roof and provided with channels extending from end-to-end thereof and a second portion to underlie the first course of shingles and to cover the channels. A... | 03/28/1978 |
