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Patent US20120302130 - Windup toy vehicle - Google Patenten
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Patent US20120302130 - Windup toy vehicle - Google Patenten
It's a Wind Up: Gorgeous Spring-Powered Toy Car Not for Kids | WIRED
Patent US3798831 - Wind-up toy vehicle with disengageable wind-up
It's a Wind Up: Gorgeous Spring-Powered Toy Car Not for Kids | WIRED
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