Caldwell; Roland B.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Caldwell; Roland B..The latest application filed is for "turbocharger control system".
- Caldwell; Roland B. - Worthington OH
- Caldwell; Roland B. - Columbus OH
| Patent | Date |
|---|---|
| Turbocharger control system Grant 4,703,625 - Caldwell November 3, 1 | 1987-11-03 |
| Control system for exhaust gas recirculating valve Grant 3,970,061 - Caldwell July 20, 1 | 1976-07-20 |
| Control system for exhaust gas recirculating valve Grant 3,915,136 - Caldwell October 28, 1 | 1975-10-28 |
| Control Apparatus For Exhaust Gas Recirculating System Grant 3,739,797 - Caldwell June 19, 1 | 1973-06-19 |
| Air Tempering System Grant 3,658,244 - Caldwell April 25, 1 | 1972-04-25 |
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