John B. Ratelband

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Rynstateflat, 6811 LV Arnhem, NL

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Patents Grantslast 30 patents

Information Patent Grant
Fire-guard
- Patent number 4,541,408
- Issue date Sep 17, 1985
- John B. Ratelband
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fire-guard
- Patent number 4,412,524
- Issue date Nov 1, 1983
- John B. Ratelband
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fire-guard
- Patent number 4,304,216
- Issue date Dec 8, 1981
- John B. Ratelband
- F24 - HEATING RANGES VENTILATING