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Entry |
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Advertisement for “Zero Friction Golf Tee,” retrieved from www.zerofrictiontees.com on Aug. 28, 2008. |
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Japanese Patent Public Disclosure No. 2005-296330. |
Microfilmed Text of Utility Model Application No. SHO 48-73686 (Japanese Utility Model Pbulic Disclosure No. SHO 50-20773). |