Patent ID: 11957962
Assignee: KARSTEN MANUFACTURING CORPORATION
Field: Furniture, games (Other fields)
Classification: CPC A  Y | IPC A

Claim 9:
10. A putter type golf club head comprising:
a putter club face on a body portion comprising grooves extending from a center portion of the putter club face toward a heel end and from the center portion of the putter club face toward a toe end, and land portions positioned between the grooves, wherein:
a width of the grooves extends in a top rail to sole direction;
the width of the grooves decreases from the center portion toward the heel end;
the width of the grooves decreases from the center portion toward the toe end;
a width of the land portions extends in a top rail to sole direction;
the width of the land portions increases from the center portion toward the heel end;
the width of the land portions increases from the center portion toward the toe end;
wherein a deepest portion of at least one groove is defined by a planar bottom surface portion of the groove when viewed in a horizontal cross section extending from the heel end to the toe end;
wherein the putter type club head has a loft angle less than 7 degrees; and
wherein a depth of a portion of the grooves is about 0.003 inch.