Roland B. Caldwell

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Worthington, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Turbocharger control system
- Patent number 4,703,625
- Issue date Nov 3, 1987
- Ranco Incorporated
- Roland B. Caldwell
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Elevation responsive automatic vehicle control system
- Patent number 4,619,286
- Issue date Oct 28, 1986
- Ranco Incorporated
- Roland B. Caldwell
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Control system for exhaust gas recirculating valve
- Patent number 3,970,061
- Issue date Jul 20, 1976
- Ranco Incorporated
- Roland B. Caldwell
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS