Stelpstra; David
Patent Applications and Registrations
Patent applications and USPTO patent grants for Stelpstra; David.The latest application filed is for "navigation device and method".
- Stelpstra; David - Amsterdam N/A NL
| Patent | Date |
|---|---|
| Navigation device with adaptive navigation instructions Grant 9,086,294 - Geelen , et al. July 21, 2 | 2015-07-21 |
| Navigation device and method App 20090177395 - Stelpstra; David | 2009-07-09 |
| Navigation Device With Adaptive Navigation Instructions App 20090157294 - Geelen; Pieter ; et al. | 2009-06-18 |
| Navigation Device with Automatic Gps Precision Enhancement App 20090070038 - Geelen; Pieter Andreas ; et al. | 2009-03-12 |
| Portable navigation device with accelerometer App 20070260398 - Stelpstra; David | 2007-11-08 |
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