1
Yoshikazu Yabuki, Hidenori Hiraoka, Yoshimasa Koizumi: Three-piece solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, January 9, 1996: US05482285 (229 worldwide citation)

A three-piece solid golf ball comprising an inner core 1a, an outer core 1b, and a cover formed principally of an ionomer resin, wherein said inner core 1a has a diameter of 10 to 38 mm, said outer core 1b has a specific gravity of 0.2 to 0.79 and has a diameter of 37 to 40 mm and a total weight of ...


2
Akihiro Nakahara, Mikio Yamada, Tadahiro Ebisuno, Kengo Oka, Takashi Sasaki: Three-piece solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, March 26, 1991: US05002281 (218 worldwide citation)

Disclosed is a three-piece solid golf ball comprising a solid core consisting of an inner core and an outer shell surrounding said inner core, and a cover covering said solid core, characterized in that a diameter of said inner core is 29 to 36 mm, a diameter of said solid core is 37 to 41 mm, a cen ...


3
Mikio Yamada: Golf ball. Sumitomo Rubber, Armstrong Nikaido Marmelstein & Kubovcik, December 2, 1986: US04625964 (189 worldwide citation)

A solid golf ball consisting of a core, an intermediate layer and a cover, said core having a diameter of not more than 32 mm and a specific gravity of not less than 1.50 and being a composition comprising 100 parts by weight of a polybutadiene rubber, 10 to 50 parts by weight of zinc acrylate or me ...


4
Tetsuo Yamaguchi, Takeshi Iwanaga: Iron type golf club head. Sumitomo Rubber, Birch Stewart Kolasch & Birch, December 20, 1988: US04792140 (157 worldwide citation)

An iron type golf club head having the whole or the central part of a ball striking face thereof, which directly touches a golf ball, fabricated from a material possessing a compression Young's modulus (modules of longitudinal elasticity) lower than that of steel.


5
Keiji Moriyama, Hidenori Hiraoka, Kazushige Sugimoto, Satoshi Iwami, Masatoshi Yokota: Solid golf ball and process for producing the same. Sumitomo Rubber, Birch Stewart Kolasch & Birch, December 16, 1997: US05697856 (151 worldwide citation)

A solid golf ball comprising a core and a cover, wherein the core has a trans structure content in polybutadiene of 10 to 30%. The core is produced by vulcanizing a rubber composition containing a butadiene rubber having cis structure content of not less than 90% before vulcanization, as a base rubb ...


6
Akihiro Nakahara, Taketo Matsuki: Three-piece solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, December 22, 1987: US04714253 (150 worldwide citation)

The present invention provides a three-piece golf ball having an excellent rebound coefficient without any damage to the durability of the golf ball by controlling the diameters, the specific gravities and the hardnesses of central core and outer layer of the solid core.


7
Taketo Matsuki, Akihiro Nakahara: Multi-piece solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, September 5, 1989: US04863167 (147 worldwide citation)

A three piece solid golf ball having improved rebound characteristics and a higher initial velocity which includes a center portion, an outer layer disposed over the center portion, and a cover disposed over the outer layer. The outer layer is formed from a rubber composition containing a base rubbe ...


8
Akihiko Hamada, Yoshimasa Koizumi, Hidenori Hiraoka, Yoshikazu Yabuki: Three-piece solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, February 13, 1996: US05490674 (144 worldwide citation)

The present invention provides a solid golf ball having excellent flying performances, stability upon iron shot and good hit feeling.


9
Tadahiro Ebisuno: Solid golf ball. Sumitomo Rubber, Birch Stewart Kolasch & Birch, July 23, 1991: US05033748 (144 worldwide citation)

Disclosed is a solid golf ball (including a one piece solid golf ball and another type solid golf ball) which has excellent durability and a high impact resilience, as well as good feeling when struck. The solid golf ball of the present invention is characterized in that a hardness (H) of a rubber p ...


10
Mikio Yamada: Two piece solid golf ball. Sumitomo Rubber, Armstrong Nikaido Marmelstein & Kubovcik, February 18, 1986: US04570937 (139 worldwide citation)

A two piece solid golf ball having a high impact resilience and an excellent durability, comprising a solid core and a cover, said solid core having a particular hardness distribution such that the hardnesses measured by a JIS-C hardness tester are from 72 to 78 at the surface, from 77 to 83 at the ...



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