Appeal 2007-1676
Application 10/439,183
11. A golf club head comprising:
a metal head body defining a hollow portion and an opening portion;
and
a metal piece including tungsten alloy,
wherein the metal piece is joined to the opening portion by arc-
welding the metal piece to the opening portion, and
wherein the metal head body is made of stainless steel, and
wherein the metal piece includes the following compositions based on
the total weight of the metal piece:
tungsten in a range of 28wt% - 32wt%;
iron in a range of 45wt% - 49wt%;
nickel in a range of 15wt% - 17wt%; and
copper in a range of lwt% - 3wt%; and
wherein the sum of amount of tungsten, iron, nickel, and copper in the
metal piece is in a range of 93wt% to 98wt%.
The Examiner relies on the following prior art references to show
unpatentability:
Shira US 5,669,825 Sep. 23, 1997
Nakahara US 5,967,905 Oct. 19, 1999
Nishizawa US 6,012,990 Jan. 11, 2000
Lee US 6,319,149 B1 Nov. 20, 2001
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