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US Patent 9517398 Extra-long air-water sandbag

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Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9517398
Date of Patent
December 13, 2016
Patent Application Number
14168896
Date Filed
January 30, 2014
Patent Citations Received
‌
US Patent 11998821 Sports training system and method
3
Patent Primary Examiner
‌
LoAn H. Thanh
Patent abstract

An extra-long air-water sandbag includes an inner bladder and an external bag. The external bag is a bag to hold the inner bladder and covers the external of the inner bladder. The inner bladder further includes an inner and outer layer container set which includes a gas container and a liquid container, and an extension layer gas container which is a bladder for containing gas and housed at the top, bottom or top and bottom thereof to increase the total length of space of gas container of the punching bag. As the length of gas container is increased, combat training for the feet is hence achieved.

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