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NARA CITY, JP
1. 20100292034 Racket grip aid - band and/or fingerholds of thumb and index finger or fingerholds of thumb and middle finger 11-18-20102. 20100234147 Racket grip aid - Fast, strong and steady racket swing can be made, without having a special skill 09-16-2010
3. 20100113192 Racket grip aid - band and/or the fingerhold of thumb or fingerholds of thumb and index finger 05-06-2010
4. 20100056309 Racket grip aid - Fast, strong and steady racket swing can be made, without having a special skill 03-04-2010