US PATENT SUBCLASS 188 / 164
.~.~.~ Magnetic circuit

Current as of: June, 1999
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188 /   HD   BRAKES

*  DD  OPERATORS {11}
158  DF  .~ Electric {2}
161  DF  .~.~ Electromagnet {3}
164.~.~.~ Magnetic circuit {1}
165  DF  .~.~.~.~> Rail-engaging

DEFINITION

Classification: 188/164

(under subclass 161) Devices in which the frictionally engaging elements form part of the electromagnetic flux circuit.