(under subclass 68.1) Structures in which the conduit has supports in its interior for supporting one or more conductors.
(1) Note. Complete the search in this class, subclass 98, and in Class 138, Pipes and Tubular Conduits, subclass 108 for conduits for supporting one or more conductors therein; and subclass 113 for conduits for supporting one or more pipes therein.
(2) Note. See this class, subclasses 28 and 29, for coaxial or concentric conductor type of structure.
(3) Note. See this class, subclass 131, for plural strand conductors with interior means to hold the conductors.
(4) Note. See this class, subclasses 146 and 147, for mid-line spacer type of insulators.
(5) Note. For similar structures in which the supporting means consists of relatively short insulating elements, such as buttons, discs, plates or beads, strung along or upon the conductors, see this class, subclass 111.
(6) Note. See Class 405, Hydraulic and Earth Engineering subclasses 132+ for tunnels and subways with supporting means. (7) Note. See Class 104, Railways, subclass 140 and indented subclasses, for railway slotted conduits, and subclass 173 and indented subclasses, for railway cable traction conduits.
(8) Note. See Class 191, Electricity: Transmission to
Vehicles, subclass 23 and indented subclasses, for conduit enclosed and supported conductors specially arranged to transmit to vehicles.
(9) Note. See Class 313, Electric Lamp and Discharge Devices, subclasses 274+, for electric lamps which have an envelope, generally of elongated tubular shape, and a filament which extends the length of the envelope, the envelope having supports in its interior for supporting the filament.
