jan 1, 1997 - In Slovenia "Water Basketball" was made a port which used a ball made of synthetics and plastics. Many people play pool basketball and made a ball that wouldn't absorb or fill up with water and not turn bad becuase of it.

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https://patentyogi.com/this-day-in-patent-history/september-22-this-day-in-patent-history-tdiph-poolside-basketball-game-patented/

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