Sydney J. Field

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Ashford, GB

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Patents Grantslast 30 patents

Information Patent Grant
Control damper
- Patent number 4,275,762
- Issue date Jun 30, 1981
- Actionair Equipment Limited
- Sydney J. Field
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Shut-off damper
- Patent number 4,256,143
- Issue date Mar 17, 1981
- Actionair Equipment Limited
- Robert J. Magill
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Shut-off damper
- Patent number 4,244,397
- Issue date Jan 13, 1981
- Actionair Equipment Limited
- Robert J. Magill
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Smoke and fire shield damper
- Patent number 4,184,288
- Issue date Jan 22, 1980
- Actionair Equipment Limited
- Robert J. Magill
- A62 - LIFE-SAVING FIRE-FIGHTING