US PATENT SUBCLASS 422 / 914
.~ Specific test tube, per se [B01L 3/14B]

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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

913  DD  TEST TUBES [B01L 3/14] {3}
914.~ Specific test tube, per se [B01L 3/14B] {1}
915  DD  .~.~> With identification means, e.g., coded [B01L 3/14B2]