US PATENT SUBCLASS 200 / 300
.~.~ Frangible element

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

237  DF  ELECTRIC SWITCH DETAILS {5}
293  DF  .~ Cases and bases {13}
300.~.~ Frangible element

DEFINITION

Classification: 200/300

(under subclass 293) Subject matter, wherein the housing includes a portion which can be readily shattered, cut or destroyed (e.g., fire box cover of glass).