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Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US7457A Inventor Howard John Wilkens Original Assignee Howard John Wilkens Priority date (The priority date is an assumption and is not a legal conclusion. This is located centrally on the stringbed, in the sweetspot area. So we look for the longest distance between the racket frame.
Tennis racquet frame protector pdf#
Google Patents Magnesium tennis racket with weighted throat pieceÄownload PDF Info Publication number US3642283A US3642283A US7457A US3642283DA US3642283A US 3642283 A US3642283 A US 3642283A US 7457 A US7457 A US 7457A US 3642283D A US3642283D A US 3642283DA US 3642283 A US3642283 A US 3642283A Authority US United States Prior art keywords racket frame throat bridge string Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. In general, the contact point with the greatest effect is where the ball has the longest contact with the strings of the tennis racket. Google Patents US3642283A - Magnesium tennis racket with weighted throat piece
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US3642283A - Magnesium tennis racket with weighted throat piece