Curve ball

Details Curve ball Curve ball

1989-07-06

1990-04-24

Marlo, George J.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273 58K, 273 65EG, 273 60B, 273DIG8, 273DIG20, A63B 3714

Patent

active

049194224

ABSTRACT:
A ball for throwing having a generally spherical shape and balance has an axis, first and second convex surfaces defined about the axis at opposite poles, and at least one groove having a non-uniform depth defined in the surface of the ball between the first and second convex surfaces. The groove is arranged to extend through the equatorial region of the ball, between the first and second convex surfaces.

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patent: 4616828 (1986-10-01), Haythornthwaite
patent: 4772020 (1988-09-01), Martin

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