US PATENT SUBCLASS 178 / 71.5
.~.~ Artificial line and relay

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


178 /   HD   TELEGRAPHY

70 R  DF  REPEATERS {16}
71.1  DF  .~ Automatic in either direction {14}
71.5.~.~ Artificial line and relay

DEFINITION

Classification: 178/71.5

Artificial line and relay:

(under subclass 71.1) Telegraph repeater having an auxiliary line for balancing impedance and an electromechanical operated contact.