US PATENT SUBCLASS 109 / 28
.~.~ With drain or sump

Current as of: June, 1999
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109 /   HD   SAFES, BANK PROTECTION, OR A RELATED DEVICE

23  DF  COMBINED {8}
26  DF  .~ With means to prevent successful use of explosives {2}
28.~.~ With drain or sump

DEFINITION

Classification: 109/28

(under subclass 26) Devices wherein there is a drain and/or a sump to remove immediately any explosive from the place in which it is inserted.