Title:
PITCHING BALL
Document Type and Number:
Japanese Patent JPS60156480
Kind Code:
A
Abstract:
A game ball has a first hemisphere provided with depressions or protrusions which constitute from 1% to 30% of the surface of the hemisphere, the depressions being located solely in the middle one-third annulus of the hemisphere. When projected along the plane of a line joining the first hemisphere and a second hemisphere, the ball will deviate from a normal trajectory in the direction of the one hemisphere. The second hemisphere may have a smooth surface, or may have a uniform texture, such as that found on a tennis ball.
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Inventors:
PEETAA GURAHAMU RITSUCHIFUIIRU
Application Number:
JP25426084A
Publication Date:
August 16, 1985
Filing Date:
December 03, 1984
Export Citation:
Assignee:
PEETAA GURAHAMU RITSUCHIFUIIRU
International Classes:
A63B37/14; A63B69/00; A63B39/00; A63B39/06; (IPC1-7): A63B39/06
Domestic Patent References:
| JP55125357B |
Attorney, Agent or Firm:
Ezaki Mitsuyoshi