Portela de Vasconcelos, Nivaldo Antonio
Patent Applications and Registrations
Patent applications and USPTO patent grants for Portela de Vasconcelos, Nivaldo Antonio.The latest application filed is for "device and method for evaluating vocal performance".
- Portela de Vasconcelos, Nivaldo Antonio - Manaus BR
| Patent | Date |
|---|---|
| Device and method for evaluating vocal performance App 20040177744 - Strasser, Thomas ; et al. | 2004-09-16 |
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