08827831 is referenced by 82 patents and cites 723 patents.

A hollow golf club incorporating a stress reducing feature including at least a toe located stress reducing feature or a heel located stress reducing feature at least partially located on the skirt of the golf club head. The location and size of the stress reducing feature and their relationship to one another play a significant role in selectively increasing deflection of the face.

Title
Golf club head having a stress reducing feature
Application Number
13/542356
Publication Number
8827831 (B2)
Application Date
July 5, 2012
Publication Date
September 9, 2014
Inventor
Justin Honea
Rowlett
TX, US
Alexander Theodore Berger
Richardson
TX, US
Michael Scott Burnett
McKinney
TX, US
Agent
Gallagher & Dawsey Co LPA
Michael J Gallagher
David J Dawsey
Assignee
Taylor Made Golf Company
CA, US
IPC
A63B 49/06
A63B 59/00
A63B 53/04
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