US PATENT SUBCLASS 446 / 21
.~ Including variable size air chamber

Current as of: June, 1999
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446 /   HD   AMUSEMENT DEVICES: TOYS

15  DF  HAVING MEANS FOR FORMING TRANSITORY BUBBLE {3}
21.~ Including variable size air chamber

DEFINITION

Classification: 446/21

Including variable sized air chamber:

(under subclass 15) Device including an expandable and contractible compartment for forcing air toward the thin film of liquid to inflate the bubble.