US PATENT SUBCLASS 70 / 338
.~.~.~ Selective shutout type
Current as of:
June, 1999
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70 /
HD
LOCKS
266
DF
OPERATING MECHANISM
{6}
336
DF
.~ Key {10}
337
DF
.~.~ Multiple keys {3}
338
.~.~.~ Selective shutout type
DEFINITION
Classification: 70/338
(under subclass 337) Subject matter wherein operation by one key may selectively shut out or prevent successful subsequent operation by another key.