United States Patent and Trademark Office.
PDF from the original on March 27, 2020.
The Wall Street Journal.
New York: American Sports Publishing Company.
Meanwhile, the increasingly sophisticated technology of internal cores also called weight blocks has increased balls' dynamic imbalance, which, in conjunction with the coverstocks' increased friction, enhances hook curving potential to achieve the higher entry angles that have enabled dramatic increases in strike percentage and game scores.
United States Bowling Congress.