US PATENT SUBCLASS 333 / 216
.~ Having negative impedance

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

213  DF  NEGATIVE RESISTANCE OR REACTANCE NETWORKS OF THE ACTIVE TYPE {2}
216.~ Having negative impedance {1}
217  DF  .~.~> Providing negative resistance

DEFINITION

Classification: 333/216

Having negative impedance:

(under subclass 213) Subject matter wherein a negative-valued impedance is produced across two of the system terminals.