US PATENT SUBCLASS 340 / 532
.~.~ Having particular safety function

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
531  DF  .~ With particular coupling link {3}
532.~.~ Having particular safety function

DEFINITION

Classification: 340/532

Having particular safety function:

(under subclass 531) Subject matter wherein the particular communication link has a specific limitation to enable safe operation in a particular environment (e.g., in the presence of explosive vapor).

(1) Note. "Intrinsic safety" systems are classified herein.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

1+, for electrical safety systems, generally.