Robert de Vries

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The Hague, NL

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Patents Grantslast 30 patents

Information Patent Grant
Tennis racket
- Patent number 4,189,142
- Issue date Feb 19, 1980
- Robert de Vries
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Detachable link-chain
- Patent number 4,056,928
- Issue date Nov 8, 1977
- Robert de Vries
- A44 - HABERDASHERY JEWELLERY