Douglas C. Harper

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Ipswich, GB

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Patents Grantslast 30 patents

Information Patent Grant
Process for preventing the formation of calcium sulphate scale
- Patent number 4,221,769
- Issue date Sep 9, 1980
- Fisons Limited
- Douglas C. Harper
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Nutrient film technique
- Patent number 4,178,716
- Issue date Dec 18, 1979
- Fisons Limited
- Douglas C. Harper
- C05 - FERTILISERS MANUFACTURE THEREOF