Wickham; David John
Patent Applications and Registrations
Patent applications and USPTO patent grants for Wickham; David John.The latest application filed is for "brake control valve apparatus".
- Wickham; David John - London EN
| Patent | Date |
|---|---|
| Brake control valve apparatus Grant 4,095,850 - Wickham June 20, 1 | 1978-06-20 |
| Rail vehicle brake pipe valve arrangement having a fluid pressure drop detector and a vent valve controlled thereby for brake pipe pressure gradient reduction Grant 4,043,606 - Wickham August 23, 1 | 1977-08-23 |
| Fluid pressure apparatus Grant 3,948,083 - Wickham April 6, 1 | 1976-04-06 |
| Controlling Railway Vehicle Brakes Grant 3,799,623 - Wickham , et al. March 26, 1 | 1974-03-26 |
| Valve Means Grant 3,799,498 - Wickham , et al. March 26, 1 | 1974-03-26 |
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