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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
4440990 Membrane keyboard assembly Apr. 3, 1984
4359710 Annular resistor with zig-zag layer pattern for resistance elements Nov. 16, 1982
4341946 Electrical resistance heating element Jul. 27, 1982
4316172 Resistor such as for dynamic braking of electric motors Feb. 16, 1982
4310745 Heating assemblies Jan. 12, 1982
4292504 Expanded metal electric heating element with edge support Sep. 29, 1981
4272668 Small round air stream heating unit Jun. 9, 1981
4249069 Flask heater assembly Feb. 3, 1981
4220846 Method and apparatus utilizing a porous vitreous carbon body particularly for fluid heating Sep. 2, 1980
4151398 Clothes dryer heating unit Apr. 24, 1979
4146868 Resistance unit structure Mar. 27, 1979
4051452 Annular resistor Sep. 27, 1977
4019023 Electrically heated dryer Apr. 19, 1977
3984615 Electrical resistance furnace heater Oct. 5, 1976
3984616 High temperature furnace heater Oct. 5, 1976
3971912 Fixing arrangement for fusing tower images Jul. 27, 1976

1 2

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