Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 22, 2009
Patent Application Number
11643763
Date Filed
December 22, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A hollow golf club head has a face portion, a crown portion, and a sole portion. Assuming that a primary deflection mode frequency of the face portion is Ff, a primary deflection mode frequency of the crown portion is Fc, and a primary deflection mode frequency of the sole portion is Fs, the Ff, Fc and Fs satisfy the following expressions: 3000 Hz<Ff<4000 Hz; 3000 Hz<Fc<4000 Hz; Fs>4000 Hz. The face portion, the crown portion and the sole portion have no mode frequency of 3000 Hz or less.
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