Balls, balloons and other inflatable objects for gymnastic...

Exercise devices – Miscellaneous

Reexamination Certificate

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C446S220000

Reexamination Certificate

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07144354

ABSTRACT:
Balls, balloons and other inflatable objects made from a plastic material with an improved resistance to tearing, suitable for use in gymnastic activities, for rehabilitation and physiotherapy comprise as stiffening material an inert mineral charge having a granulometry between 0.02 μ and 500 μ, in an amount between 0.50% and 20% by weight.

REFERENCES:
patent: 5181717 (1993-01-01), Donntag et al.
patent: 5558325 (1996-09-01), Hargis et al.
patent: 5961363 (1999-10-01), Spector
patent: 6664205 (2003-12-01), Oda et al.
patent: 6685585 (2004-02-01), Shishido et al.

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