DUFFIELD; ROBERT
Patent Applications and Registrations
Patent applications and USPTO patent grants for DUFFIELD; ROBERT.The latest application filed is for "adaptive virtual keyboard".
- DUFFIELD; ROBERT - COEUR D'ALENE ID
- Duffield; Robert - New Alexandria PA
- Duffield; Robert - Penarth GB7
| Patent | Date |
|---|---|
| Adaptive Virtual Keyboard App 20130257732 - DUFFIELD; ROBERT | 2013-10-03 |
| Device for adding soap to shower water Grant 4,193,520 - Duffield March 18, 1 | 1980-03-18 |
| Method for the recovery of volatile liquids Grant 4,122,684 - Clarkson , et al. October 31, 1 | 1978-10-31 |
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