US PATENT SUBCLASS 473 / FOR 138
.~ Tennis (273/61R)


Current as of: June, 1999
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473 /   HD   GAMES USING TANGIBLE PROJECTILE

FOR 134  DF  BALLS (273/58R) {14}
FOR 138.~ Tennis (273/61R) {4}
FOR 139  DF  .~.~> Ping-pong balls (273/61A)
FOR 140  DD  .~.~> Fabrics, per se (273/61B)
FOR 141  DD  .~.~> Rubber formulations (273/61C)
FOR 142  DD  .~.~> Methods of pressurizing (273/61D)