GOLF CLUB HEAD WITH VARIABLE THICKNESS FACE

1 . An iron type golf club head comprising:

a striking face portion located at a frontal portion of said iron type golf club head, adapted to strike a golf ball;

wherein said striking face portion has an external frontal surface that is substantially planar,

wherein said striking face portion has an internal rear surface that is uneven,

wherein said external frontal surface and said internal rear surface combine to define a thickness of said striking face portion, and

wherein said striking face portion further comprises;

a first region of increased thickness, located near a centroid of said striking face portion, and

a second region of increased thickness, located away from said centroid of said striking face portion,

a body portion attached to a rear of said iron type golf club head.

2 . The iron type golf club head of claim 1 , wherein said second region of increased thickness is located heelward of said first region of increased thickness.

3 . The iron type golf club head of claim 2 , wherein said second region of increased thickness is located lower on said striking face portion than said first region of increased thickness.

4 . The iron type golf club head of claim 3 , wherein said second region of increased thickness is located at a distance of between about 8.0 mm to about 9.0 mm heelward from said first region of increased thickness, and

wherein said second region of increased thickness is located at a distance of between about 7.0 mm to about 10.0 mm lower on said striking face portion from said first region of increased thickness.

5 . The iron type golf club head of claim 4 , wherein said second region of increased thickness is located at a distance of between about 8.25 mm to about 8.75 mm heelward from said first region of increased thickness, and

wherein said second region of increased thickness is located at a distance of between about 8.0 mm to about 9.0 mm lower on said striking face portion from said first region of increased thickness.

6 . The iron type golf club head of claim 5 , wherein said second region of increased thickness is located at a distance of about 8.75 mm heelward from said first region of increased thickness, and

wherein said second region of increased thickness is located at a distance of about 8.5 mm lower on said striking face portion from said first region of increased thickness.

7 . The iron type golf club head of claim 1 , wherein a first thickness of said first region of increased thickness is thicker than a second thickness said second region of increased thickness.

8 . The iron type golf club head of claim 7 , where said first thickness is more than about 1.10 times greater than said second thickness.

9 . The iron type golf club head of claim 8 , wherein said first thickness is more than about 1.12 times greater than said second thickness.

10 . The iron type golf club head of claim 9 , wherein said first thickness is more than about 1.13 times greater than said second thickness.

11 . The iron type golf club head of claim 10 , wherein said first thickness is between about 2.00 mm to about 2.20 mm.

12 . The iron type golf club head of claim 11 , wherein said first thickness is between about 2.05 mm to about 2.15 mm.

13 . The iron type golf club head of claim 12 , wherein said first thickness is about 2.10 mm.

14 . An iron type golf club head comprising:

a striking face portion located at a frontal portion of said iron type golf club head, adapted to strike a golf ball;

wherein said striking face portion has an external frontal surface that is substantially planar,

wherein said striking face portion has an internal rear surface that is uneven,

wherein said external frontal surface and said internal rear surface combine to define a thickness of said striking face portion, and

wherein said striking face portion further comprises;

a second region of increased thickness, located at a location that is 15 mm upwards from a ground plane, and at a distance that is a midpoint of a full length scoreline,

a first region of increased thickness, located toeward of said second region of increased thickness,

a body portion attached to a rear of said iron type golf club head.

15 . The iron type golf club head of claim 14 , wherein said first region of increased thickness is located higher up on said striking face portion than said second region of increased thickness.

16 . The iron type golf club head of claim 15 , wherein a first thickness of said first region of increased thickness is thicker than a second thickness said second region of increased thickness.

17 . The iron type golf club head of claim 16 , where said first thickness is more than about 1.10 times greater than said second thickness.

18 . The iron type golf club head of claim 17 , wherein said first thickness is more than about 1.12 times greater than said second thickness.

19 . The iron type golf club head of claim 18 , wherein said first thickness is between about 2.00 mm to about 2.20 mm.

20 . An iron type golf club head comprising:

a striking face portion located at a frontal portion of said iron type golf club head, adapted to strike a golf ball;

wherein said striking face portion has an external frontal surface that is substantially planar,

wherein said striking face portion has an internal rear surface that is uneven,

wherein said external frontal surface and said internal rear surface combine to define a thickness of said striking face portion, and

wherein said striking face portion further comprises;

a second region of increased thickness, located at a location that is 15 mm upwards from a ground plane, and at a distance that is a midpoint of a full length scoreline,

a first region of increased thickness, located near a centroid of said striking face portion

a body portion attached to a rear of said iron type golf club head, and

wherein a first thickness of said first region of increased thickness is thicker than a second thickness said second region of increased thickness.