US PATENT SUBCLASS 379 / 346
.~ With frequency discriminator or negative impedance element

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


379 /   HD   TELEPHONIC COMMUNICATIONS

338  DF  REPEATER (E.G., VOICE FREQUENCY) {9}
346.~ With frequency discriminator or negative impedance element

DEFINITION

Classification: 379/346

With frequency discriminator or negative impedance element:

(under subclass 338) Subject matter which (a) selectively passes particular signal frequencies, or (b) has elements which have negative impedance.