US PATENT SUBCLASS 89 / 1.817
.~.~ Including a forward closure

Current as of: June, 1999
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89 /   HD   ORDNANCE

1.8  DF  ROCKET LAUNCHING {10}
1.816  DF  .~ Having tubular guide means {2}
1.817.~.~ Including a forward closure

DEFINITION

Classification: 89/1.817

(under subclass 1.816) Apparatus comprising means to close the end of the guide means through which a rocket may pass when it is launched.