US PATENT SUBCLASS 174 / 266
.~.~.~.~ Hollow (e.g., plated cylindrical hole)

Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

68.1  DF  CONDUITS, CABLES OR CONDUCTORS {15}
250  DF  .~ Preformed panel circuit arrangement (e.g., printed circuit) {9}
261  DF  .~.~ With particular conductive connection (e.g., crossover) {2}
262  DF  .~.~.~ Feedthrough {3}
266.~.~.~.~ Hollow (e.g., plated cylindrical hole)

DEFINITION

Classification: 174/266

Hollow (e.g., plated cylindrical hole):

(under subclass 262) Subject matter wherein the feedthrough surrounds an empty space.

(1) Note. This subclass includes hollow preform inserts.