Pat. No. 3,012,781 granted on December 12, 1961 to Glen Nelson of St Paul, Minnesota for a “Basketball Training Apparatus” trains a player to improve jumping for the ball.

Lesley University basketball player Baileigh Sinaman-Daniel (44) pressures teammate Leila Chisholm while practicing prior to game, Tuesday, Feb. 11, 2025, in Lexington, Mass. Charles Krupa/AP ...