US PATENT SUBCLASS 200 / 50.09
.~.~ With key-controlled

Current as of: June, 1999
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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

50.01  DF  INTERLOCKING {4}
50.02  DF  .~ Between switches and housing {11}
50.09.~.~ With key-controlled

DEFINITION

Classification: 200/50.09

With key-controlled:

(under subclass 50.02) Subject matter including a metal instrument inserted into the interlocking means to move its bolt to operate the device.