US PATENT SUBCLASS 400 / 676
.~ Key-board security lock (e.g., cover plate, etc.)

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

663  DF  LOCKING OR INTERLOCKING MECHANISM {7}
676.~ Key-board security lock (e.g., cover plate, etc.)

DEFINITION

Classification: 400/676

Key-board security lock (e.g., cover plate, etc.):

(under subclass 663) Subject matter wherein significance is attributed to means for preventing access to the key-board* of a typewriter.