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Class Information
Number: 338/280
Name: Electrical resistors > Ribbon resistance element bent or curved on flat side > Zigzag or sinuous
Description: Subject matter wherein the flat ribbon or strip resistance element is bent or curved into a zigzag or sinusoid.










Sub-classes under this class:

Class Number Class Name Patents
338/281 Element includes integral stiffening structure 26


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8692647 Resistor grid assembly Apr. 8, 2014
8541721 Wake generating solid elements for joule heating or infrared heating Sep. 24, 2013
7932808 Load resistor Apr. 26, 2011
7876195 Fan resistor Jan. 25, 2011
7288749 Electrical heating device and method of its manufacture Oct. 30, 2007
6995978 Housing with active external cooling and at least one electronic component with heat-dissipating capacity Feb. 7, 2006
6917278 Resistor banks Jul. 12, 2005
6737615 Heat conductor coil for heating a flowing gaseous medium and electrical resistance heating element May. 18, 2004
6694975 Temperature controlling device for aerosol drug delivery Feb. 24, 2004
6353707 Electric heating ribbon with multiple coating sections attached to ribbon Mar. 5, 2002
6329900 Resistor elements Dec. 11, 2001
6232869 FBT, its bleeder resistor, and device for coupling bleeder resistor May. 15, 2001
6184775 Surface mount resistor Feb. 6, 2001
6081183 Resistor adapted for use in forced ventilation dynamic braking applications Jun. 27, 2000
5877674 Resistor with elongated resistor element panels Mar. 2, 1999
5700992 Zigzag heating device with downward directed connecting portions Dec. 23, 1997
5686880 Continuous weave resistor grid Nov. 11, 1997
5671323 Zigzag heating device with downward directed connecting portions Sep. 23, 1997
5641421 Amorphous metallic alloy electrical heater systems Jun. 24, 1997
5519191 Fluid heater utilizing laminar heating element having conductive layer bonded to flexible ceramic foil substrate May. 21, 1996
5488334 Air-cooled power load Jan. 30, 1996
5304978 Resistor grid assembly having "U" bend resistor elements Apr. 19, 1994
5281944 Slide-in resistor grid Jan. 25, 1994
5252943 Resistor element whose electrically resistive layer has extension into openings in cylindrical ceramic support Oct. 12, 1993
5245310 Resistor grid insulator mountings Sep. 14, 1993
5221917 Resistor ribbon for resistor grids Jun. 22, 1993
5165052 Slide-in resistor grid Nov. 17, 1992
5159310 Resistor grid heat dissipating assembly Oct. 27, 1992
5155798 Quick-response quartz tube infra-red heater Oct. 13, 1992
5113049 Flexible induction heating coil May. 12, 1992
5049852 Resistor grid heat dissipating assembly Sep. 17, 1991
5049851 Embossed and lanced resistor structure Sep. 17, 1991
5045831 Vertical flight resistor grid Sep. 3, 1991
4994634 Sheet switch Feb. 19, 1991
4845345 Electrical heating element with meander-shaped windings Jul. 4, 1989
4837549 Tapped resistor grid assembly Jun. 6, 1989
4659906 Infrared panel emitter and method of producing the same Apr. 21, 1987
4651124 Frame supported grid resistor Mar. 17, 1987
4649368 Electrical resistance heating element Mar. 10, 1987
4636615 Electrical resistance heating element having a bimetallic protective switch Jan. 13, 1987
4630024 Grid resistor and improved grid element therefor Dec. 16, 1986
4584464 Heating element Apr. 22, 1986
4568908 Compact resistor assembly Feb. 4, 1986
4563572 High-efficiency task heater Jan. 7, 1986
4553126 Resistance heating element Nov. 12, 1985
4551614 Electrical resistance heater unit Nov. 5, 1985
4529958 Electrical resistor Jul. 16, 1985
4471213 Uniform airstream distribution hair dryer Sep. 11, 1984
4467311 Electrical resistor Aug. 21, 1984
4450347 Heating body May. 22, 1984

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