Bottrill; John
Patent Applications and Registrations
Patent applications and USPTO patent grants for Bottrill; John.The latest application filed is for "power converter employing switched split transformer primary".
- Bottrill; John - Amherst NH
- Bottrill; John - Chichester GB2
- Bottrill; John - Ottawa CA
| Patent | Date |
|---|---|
| Pre-zero crossing signal generator for sinusoidal voltages with DC offsets such as telephone ring voltages Grant 6,920,220 - Bottrill July 19, 2 | 2005-07-19 |
| Power Converter Employing Switched Split Transformer Primary App 20040052094 - Bottrill, John | 2004-03-18 |
| Power converter employing switched split transformer primary Grant 6,707,690 - Bottrill March 16, 2 | 2004-03-16 |
| Pre-zero crossing signal generator for sinusoidal voltages with DC offsets such as telephone ring voltages App 20030091179 - Bottrill, John | 2003-05-15 |
| Vehicle exterior mirror Grant 5,081,546 - Bottrill January 14, 1 | 1992-01-14 |
| Universal signal generator for generating telephone system high level signals Grant 4,284,854 - Hayward , et al. August 18, 1 | 1981-08-18 |
| Safety belt rewinding mechanism with improved retraction characteristics Grant 4,123,013 - Bottrill , et al. October 31, 1 | 1978-10-31 |
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