Wolff; Efram Benjamin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Wolff; Efram Benjamin.The latest application filed is for "mechanically fastened diaphragmatic guitar plectrum retainer".
- Wolff; Efram Benjamin - Vashon WA
| Patent | Date |
|---|---|
| Mechanically fastened diaphragmatic guitar plectrum retainer Grant 9,653,050 - Wolff May 16, 2 | 2017-05-16 |
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