US PATENT SUBCLASS 178 / 63 F
.~.~ Direction reversing
Current as of: June, 1999
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Unofficial Alpha Subclasses: R A B C D E F
DEFINITION
Classification: 178/63
(under subclass 2) Systems adapted to the transmission of code signals over cables or long lines, involving large electric capacity and usually characterized by the use of reversals of current in transmission, clearing line, eliminating "tailings", static compensation, etc.; also because of analogy of means all current reversing telegraph systems not otherwise classifiable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16, for automatic current reversing systems.
44, for wave transmitting systems having means to diminish or prevent distortion or attenuation, and especially applicable to long lines, cables, and systems involving large capacity or inductances.
55+, for quadruplex systems.
58+, for duplex systems.
69, for line clearing systems, per se. SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks,
12, for transmission line inductive or radiation interference reduction systems, and subclass 23 for artificial lines simulating cable lines.
375, Pulse or Digital Communications,
257, for cable systems and components.
