US PATENT SUBCLASS 313 / 344
.~.~ Coiled

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

326  DF  ELECTRODE AND SHIELD STRUCTURES {14}
341  DF  .~ Filament or resistance heated electrodes {4}
344.~.~ Coiled

DEFINITION

Classification: 313/344

(under subclass 341) Filaments and electrodes where the filament is formed into a coil.

(1) Note. A coil is defined for the purpose of classification in this subclass as a filament or electrode having at least one convolution.

SEE OR SEARCH THIS CLASS, SUBCLASS:

341, for mere U-shaped, V-shaped or looped filaments and electrodes within the definition of subclass 341.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

592, for metallic stock material in the shape of a helix or which has a helical component.