Bowling ball

Details Bowling ball Bowling ball

1975-04-22

1978-07-11

Marlo, George J.

Amusement devices: games

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

Target

273171, A63B 3710, A63B 4304

Patent

active

040997154

ABSTRACT:
Top weight and/or total weight are adjusted by drilling a hole into the ball along a diameter passing through the center of the top weight area and the center of gravity of total ball weight. Weighted plugs are then located at the two centers by an intervening spacer, and the hole closed by a closure cap.

REFERENCES:
patent: 531103 (1894-12-01), Dokkenwadel
patent: 2291738 (1942-08-01), Luth et al.
patent: 3441274 (1969-04-01), Collins
patent: 3591177 (1971-07-01), Skuse

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