David S. Duncan

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London, GB

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Patents Grantslast 30 patents

Information Patent Grant
Razor blade assembly
- Patent number 4,860,449
- Issue date Aug 29, 1989
- Wilkinson Sword Limited
- David S. Duncan
- B26 - HAND CUTTING TOOLS CUTTING SEVERING
Information Patent Grant
Razor blade assembly and its method of manufacture
- Patent number 4,852,254
- Issue date Aug 1, 1989
- Wilkinson Sword Limited
- David S. Duncan
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Razor blade assembly and its method of manufacture
- Patent number 4,690,018
- Issue date Sep 1, 1987
- Wilkinson Sword Limited
- David S. Duncan
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Knife sharpeners
- Patent number 4,654,968
- Issue date Apr 7, 1987
- Wilkinson Sword Limited
- Derrick R. Gatley
- B26 - HAND CUTTING TOOLS CUTTING SEVERING
Information Patent Grant
Razors and shaving units for razors
- Patent number 4,501,067
- Issue date Feb 26, 1985
- Wilkinson Sword Limited
- David S. Duncan
- B26 - HAND CUTTING TOOLS CUTTING SEVERING

Patents Applicationslast 30 patents

Information Patent Application
Device for grouping elongate items
- Publication number 20040195133
- Publication date Oct 7, 2004
- David Stephen Duncan
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES