US PATENT SUBCLASS 174 / 32
ANTI-INDUCTIVE STRUCTURES


Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

32ANTI-INDUCTIVE STRUCTURES {2}
33  DF  .~> Conductor transposition {1}
35 R  DF  .~> Shielded or screened {7}


DEFINITION

Classification: 174/32

(under the class definition) Structures having means for preventing or reducing the detrimental effects due to either self-inductance of a single conductor or mutual inductance between plural conductors.

(1) Note. Where the only anti-inductive means is constituted by one or more surrounding conduits or sheaths or conduit partition walls of conductive material, classification is in this class, subclass 68.1 and indented

subclasses, particularly subclass 102 and indented subclasses, in which subclasses the surrounding sheath may be a conductive coating. If shields or electrical means in addition to the conduit or cable structure are provided, they are in this subclass (32) or appropriate indented subclasses.

(2) Note. Where only the physical structure of a single bare conductor, whether of single or plural strands, is claimed, it is in this class, subclass 126.1 and indented subclasses, even though anti-inductive characteristics are alleged in the claim.

(3) Note. For conductor, cable and conduit structures having air-spaces or utilizing fluids, even though the structure is for anti-inductive purposes, see this class, subclass 24 and indented subclasses, especially subclasses 27, 28 and 29.

(4) Note. Search appropriate classes for particular apparatus having anti-inductive means as a part thereof.

(5) Note. For electrical systems having anti-inductive means, see the appropriate class, particularly Class 178, Telegraphy, subclasses 45, 49 and 69; Class 307, Electrical Transmission or Interconnection Systems, subclasses 89+; Class 333, Wave Transmission Lines and Networks, particularly subclass 12, for transmission line inductive interference reduction systems; and Class 340, Communications: Electrical, particularly subclasses 288+ and 310.07. Electrical conductors combined with condensers, reactors or resistors have been classified as electrical systems. Class 379, Telephonic Communications, subclass 415. SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

342, for noninductive filaments for electric lamps and electric space discharge devices.

338, Electrical Resistors,

61+, for electrical resistors with inductance reducing means.