US PATENT SUBCLASS 315 / 3.6
.~.~.~ Line with plural characteristics or plural lines

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

1  DF  CATHODE RAY TUBE CIRCUITS {11}
3  DF  .~ Combined cathode ray tube and circuit element structure {2}
3.5  DF  .~.~ Traveling wave tube with delay-type transmission line {1}
3.6.~.~.~ Line with plural characteristics or plural lines

DEFINITION

Classification: 315/3.6

(under subclass 3.5) Subject matter which is provided with a plurality of transmission lines or devices, or which has the transmission line or device constructed so as to have a section which has different characteristics from another section.

(1) Note. For example, the device may have a plurality of beams and a plurality of transmission lines, or a single beam with a plurality of transmission lines arranged parallel to each other or in series relation along the path of the beam, or may have the transmission line arranged to have different retarding times along its length or have portions provided with coatings or other means to provide different attenuation at different portions of the line.

(2) Note. This subclass does not include subject matter under subclass 3.5 where the transmission line or device is only provided with impedance matching means designed to facilitate the coupling of the transmission line or device to an input or output coupling means (even though such impedance matching means involves differences in structure in the transmission line or device such as changing the spacing of the turns of a spiral transmission line). Such subject matter is classified in subclass 3.5 in the absence of other structure, causing classification in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.16+, 5.27, 5.28, and 5.39+, for traveling wave tubes having a plurality of hollow transmission lines (e.g., waveguides), at least one line being designed to propagate a traveling wave, and having means producing an electron beam transverse to the transmission lines so that energy may be exchanged between the beam and the energy in the transmission lines.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks, 22, for transmission lines of the distributed parameter type having dissipating terminators, subclass 81 for transmission lines and devices with an attenuator means and attenuators especially designed for use with transmission lines and devices of the distributed parameter type, and subclasses

236+ for the structure of transmission lines and devices of the distributed parameter type.