US PATENT SUBCLASS 102 / 407
.~.~ Practice (e.g., drill)

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102 /   HD   AMMUNITION AND EXPLOSIVES

401  DF  MINES {5}
406  DF  .~ Marine type {5}
407.~.~ Practice (e.g., drill)

DEFINITION

Classification: 102/407

Practice (e.g., drill):

(under subclass 406) Subject matter wherein the mine is constructed for use in practice, e.g., has no explosive charge, a very small explosive charge, reusable, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

444, for a cartridge with a practice projectile, and see the search notes.