06390933 is referenced by 230 patents.

A golf club having a club head having with a coefficient of restitution greater than 0.845 and a durability to withstand 2000 impacts with a golf ball at 110 mile per hour is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4.00 square inches to 7.50 square inches.

Title
High cofficient of restitution golf club head
Application Number
9/705253
Publication Number
6390933 (B1)
Application Date
November 2, 2000
Publication Date
May 21, 2002
Inventor
Homer E Aguinaldo
San Diego
CA, US
Ronald C Boyce
San Diego
CA, US
Alan Hocknell
Encinitas
CA, US
Richard C Helmstetter
Rancho Santa Fe
CA, US
J Andrew Galloway
Escondido
CA, US
Agent
Michael A Catania
US
Assignee
Callaway Golf Company
CA, US
IPC
A63B 53/02
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