US PATENT SUBCLASS 333 / 221
.~.~ With tuning

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

219  DF  RESONATORS (DISTRIBUTED PARAMETER TYPE) {7}
220  DF  .~ Open wire or Lecher line {1}
221.~.~ With tuning

DEFINITION

Classification: 333/221

With tuning:

(under subclass 220) Subject matter wherein the resonator has means which can be adjusted to resonate or operate at a specified frequency.