US PATENT SUBCLASS 290 / 29
.~.~ Rotary field and armature

Current as of: June, 1999
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290 /   HD   PRIME-MOVER DYNAMO PLANTS

7  DF  ELECTRIC CONTROL {10}
*  DD  .~ Traction {5}
29.~.~ Rotary field and armature

DEFINITION

Classification: 290/29

Electric-control traction prime-mover dynamo plants which include a dynamo electric machine having a field and armature, both of which rotate.