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Patent applications and USPTO patent grants for Yeh; Ping Chang.The latest application filed is for "crash helmet that is assembled easily and rapidly".
Patent | Date |
---|---|
Crash helmet that is assembled easily and rapidly Grant 7,210,174 - Yeh May 1, 2 | 2007-05-01 |
Crash helmet that is assembled easily and rapidly App 20060230507 - Yeh; Ping Chang | 2006-10-19 |
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