Pierre-Alain Walder

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Bienne, CH

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Patents Grantslast 30 patents

Information Patent Grant
Wristwatch case including a back cover rising along the caseband
- Patent number 5,233,574
- Issue date Aug 3, 1993
- Montres Rado S.A.
- Pierre-Alain Walder
- G04 - HOROLOGY
Information Patent Grant
Telescopically extensible bracelet clasp
- Patent number 5,105,510
- Issue date Apr 21, 1992
- Montres Rado S.A.
- Philippe Roulin
- A44 - HABERDASHERY JEWELLERY
Information Patent Grant
Method of manufacture of a copper watch case
- Patent number 5,021,101
- Issue date Jun 4, 1991
- Eta Sa Fabriques d'Ebauches
- Eric Loth
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...