Michel Ratajski

Follow

Person

Bienne, CH

People

Patents Grantslast 30 patents

Information Patent Grant
Wrist watch case with vulcanized gasket
- Patent number 4,497,584
- Issue date Feb 5, 1985
- Firma H. Finger
- Michel Ratajski
- G04 - HOROLOGY
Information Patent Grant
Watertight watchcase having a removable polygonal hard glass
- Patent number 4,198,811
- Issue date Apr 22, 1980
- Montres Rado S.A.
- Michel P. Ratajski
- G04 - HOROLOGY
Information Patent Grant
Apparatus for determining the degree of gas impermeability for watc...
- Patent number 3,978,710
- Issue date Sep 7, 1976
- OMEGA Louis Brandt & Frere S.A.
- Michel Ratajski
- G04 - HOROLOGY