Keil; Siegfried
Patent Applications and Registrations
Patent applications and USPTO patent grants for Keil; Siegfried.The latest application filed is for "writing instrument".
- Keil; Siegfried - Gross-Bierberau DE
- Keil; Siegfried - Gross-Bieberau DE
| Patent | Date |
|---|---|
| Writing instrument Grant D567,288 - Keil April 22, 2 | 2008-04-22 |
| Writing utensil Grant D485,574 - Keil January 20, 2 | 2004-01-20 |
| Writing instrument Grant D443,896 - Briggl , et al. June 19, 2 | 2001-06-19 |
| Writing instrument Grant D437,888 - Briggl , et al. February 20, 2 | 2001-02-20 |
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