US PATENT SUBCLASS 333 / 4
.~ With balanced circuits


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

1  DF  PLURAL CHANNEL SYSTEMS {4}
4.~ With balanced circuits {1}
5  DF  .~.~> Plural balanced circuits


DEFINITION

Classification: 333/4

(under subclass 1) Systems wherein at least one of the transmission lines is a balanced line, or having a network under subclass 1 which is especially designed for connection to at least one balanced circuit.

(1) Note. A balanced line or circuit is a line or circuit having its conductors electrically symmetrical with respect to a reference potential plane (e.g. ground).

SEE OR SEARCH THIS CLASS, SUBCLASS:

12, for transmission line inductive or radiation interference reduction systems, involving a balanced transmission circuit.

25+, for coupling networks for coupling a single channel balanced circuit to an unbalanced circuit.

236+, for single transmission lines of the long line type, which may be balanced.

SEE OR SEARCH CLASS 174, Electricity: Conductors and Insulators, particularly

32+, 37+, 40+, and 68.1+ for electrical conductor structure of the electrically balanced type other than loaded lines or transmission lines defined as having long line characteristics.

307, Electrical Transmission or Interconnection Systems, particularly

12+, 42 or 147+ for miscellaneous electrical transmission or interconnecting systems which include balanced circuits.

343, Communications: Radio Wave,

814, and 816 for plural balanced doublet antennas with coupling networks; and subclass 865 for a balanced antenna with a balanced coupling network.

363, Electric Power Conversion Systems, particularly

2+, 9+, 36, and 148+ for balanced phase conversion systems for converting electrical energy from one number of phases to a different number of phases (e.g., single phase to

polyphase).

365, Static Information Storage and Retrieval,

202, for complementing or balancing signals used in a read/write circuit.

370, Multiplex Communications, 200, for a phantom circuit used in the multiplex system, and subclasses 278 and 282+ for a duplex system which may include a balance circuit.

379, Telephonic Communications, for telephone systems which involve balanced transmission lines.