US PATENT SUBCLASS 71 / 7
.~.~ Nitrogen fixing or nitrifying

Current as of: June, 1999
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71 /   HD   CHEMISTRY: FERTILIZERS

1  DF  PROCESSES AND PRODUCTS {5}
6  DF  .~ Bacterial {2}
7.~.~ Nitrogen fixing or nitrifying

DEFINITION

Classification: 71/7

(under subclass 6) Methods and compositions where nitrogen fixing or nitrifying bacteria is utilized.