US PATENT SUBCLASS 379 / 177
POLYSTATION LINE SYSTEM (I.E., PARTY LINE)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

177POLYSTATION LINE SYSTEM (I.E., PARTY LINE) {6}
178  DF  .~> Revertive call
179  DF  .~> Call alerting (e.g., ringing) {2}
182  DF  .~> Automatic or unattended {2}
185  DF  .~> Portable or mobile
186  DF  .~> Central power source
187  DF  .~> Connected to central office

DEFINITION

Classification: 379/177

POLYSTATION LINE SYSTEM (I.E., PARTY LINE):

(under the class definition) Subject matter wherein the terminals of plural subscribers having different call addresses are connected to the central switching office by a single line.

SEE OR SEARCH CLASS

178, Telegraphy,

2, for party line telegraph systems.

340, Communications: Electrical,

825.38+, for selective party line signalling.