Wood-type metal golf club head and process for producing the same
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United States of America Patent
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-
Aug 4, 1992
Grant Date -
N/A
app pub date -
Aug 27, 1991
filing date -
Aug 30, 1990
priority date (Note) -
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status (Latency Note)
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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.
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