US PATENT SUBCLASS 60 / 39.8
.~.~.~ With pressure actuated valve

Current as of: June, 1999
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60 /   HD   POWER PLANTS

39.01  DF  COMBUSTION PRODUCTS USED AS MOTIVE FLUID {31}
722  DF  .~ Combustion products generator {14}
39.76  DF  .~.~ Intermittent combustion type {5}
39.8.~.~.~ With pressure actuated valve