US PATENT SUBCLASS 435 / FOR 217
.~.~ Using positive selection technique (935/92)


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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

FOR 214  DD  HYBRID OR FUSED CELL TECHNOLOGY, E.G., HYBRIDOMA, ETC. (935/89) {4}
FOR 215  DD  .~ Method of selection of the desired cell (935/90) {2}
FOR 217.~.~ Using positive selection technique (935/92)