(under the class definition) Structures specialized for positioning underground.
(1) Note. Manholes, i.e., underground work chambers, are in this subclass. Single manholes with radiating conduits or cables are in this subclass, but plural interconnected manholes are in subclass 38, and manholes combined with road or pavement structure are in subclass 39.
(2) Note. Such structures employing fluids or a vacuum are in this class, subclass 8 and indented subclasses.
(3) Note. See this class, subclasses 48 and 49, for wall mounted conduits or housings.
(4) Note. Mere box or housing structures are in this class, subclass 50 and indented subclasses.
(5) Note. Mere conduit or cable structures are in this
class, subclass 68.1 and indented subclasses, end structure being in subclass 74 and indented subclasses, even though disclosed for use in manholes. (6)
The classes noted in Search Class, below, have the structures there provided for when not restricted solely to electrical apparatus, even though electrical apparatus may be included as part of the combination.
(7) Note. Search Class 429, Chemistry: Electrical Current Producing Apparatus, Product, and Process, subclass 47 for a battery wherein a portion of the earth constitutes a part of the battery.
(8) Note. See Class 52 subclasses 169.1+ for particular constructions with a specified terranean relationship.
(9) Note. For underground transmission to vehicles, see Class 104, Railways, particularly subclass 140 and indented subclasses, and Class 191, Electricity: Transmission to Vehicles, particularly subclass 23 and indented subclasses.
SEE OR SEARCH CLASS
405, Hydraulic and Earth Engineering,
132+, for tunnels and subways. (See (6) Note, above.)
137, Fluid Handling,
236, for fluid handling systems including geos:graphic feature, and subclasses 363+ for fluid handling devices including ground supports. (See (6) Note, above.)
138, Pipes and Tubular Conduits,
105, for pipes in a trench; subclass 108 for underground conduits for supporting cables therein; and subclass 113 for underground conduits for supporting pipes therein. (See (6) Note, above.) 333, Wave Transmission Lines and Networks,
236+, for long transmission lines having distributed electrical parameters, and subclasses 1+ for plural channel systems of such lines.
343, Communications: Radio Wave Antennas,
719, for antennas buried underground or submerged under water.
404, Road Structure, Process, or Apparatus,
3, 4+, and 17+ for conduits combined with pavement, curb or
gutter structure and not limited solely to electrical use. (See (6) Note, above.)
