Amusement devices: games – Puzzles – Take-aparts and put-togethers
Patent
1991-08-27
1992-08-04
Shapiro, Paul E.
Amusement devices: games
Puzzles
Take-aparts and put-togethers
273167H, 273DIG7, 264 453, 264DIG6, A63B 5304
Patent
active
051352273
ABSTRACT:
A wood-type metal golf club head comprising a hollow metal head body and a core material filling the inside of the metal head body, wherein the core material is an aggregate prepared by fusing expandable beads comprising a microcapsule of a synthetic polymer and an expanding gas enclosed therein to each other by the expansion of the gas and has a bulk specific gravity of 0.05 to 0.15 g/cm.sup.3.
REFERENCES:
patent: 3864181 (1975-02-01), Wolinski et al.
patent: 4128963 (1978-12-01), Dano
patent: 4413822 (1983-11-01), Fernandez et al.
patent: 5007643 (1991-04-01), Okumoto et al.
Okumoto Takaharu
Soeda Heihatiro
Shapiro Paul E.
The Yokohama Rubber Co. Ltd.
Wong Steven B.
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