(under subclass 900) Subject matter wherein the elongated antenna is composed of multiple sections capable of sliding motion within each other to be extensible or retractable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
823, for dipoles with telescoping arms for adjusting the length.
871, for collapsible loop frames.
883, for antennas with a telescoping support.
889, for rod antennas retractable into a support.
SEE OR SEARCH CLASS 52, Static Structures (e.g., Buildings),
121, for a shaft of more general application which is longitudinally extensible by a flexible drive or hoist.
174, Electricity: Conductors and Insulators,
69, for conductors which are extensible.
285, Pipe Joints or Coupling,
298+, for adjustable length pipe joints or couplings.
