Games using tangible projectile – Projectile – per se; part thereof or accessory therefor – Having hollow core or bladder enclosed within cover
Patent
1997-12-11
1998-11-03
Wong, Steven
Games using tangible projectile
Projectile, per se; part thereof or accessory therefor
Having hollow core or bladder enclosed within cover
442321, 442381, A63B 3900
Patent
active
058300929
ABSTRACT:
A tennis ball having an outer felt fabric comprising at least two layers of non-woven fabric with the outer layer having a weight ratio of wool therein greater than 45% and the inner or bottom layer having a weight ratio of wool therein less than 40%.
REFERENCES:
patent: 127813 (1872-06-01), Waite
patent: 1737607 (1929-12-01), McDermott
patent: 2706514 (1955-04-01), Anderson
patent: 2777787 (1957-01-01), Bragg, Jr.
patent: 4222806 (1980-09-01), Parker
patent: 4439471 (1984-03-01), Lacoste et al.
Marden Earle R.
Milliken Research Corporation
Moyer Terry T.
Wong Steven
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