Inventor
Michel P. Ratajski
Inventor
Bienne, CH
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G04Bprimary
G04BMechanically-driven clocks or watches25%
LOC1025%
A44CPersonal adornments, e.g. jewellery13%
G04DApparatus or tools specially designed for making or maintaining clocks or watches13%
LOC1113%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
D0807224'Watch bracelet link'2018D0565970'Wristwatch'2008D0565433'Wristwatch'20085,699,590'Clasp with unfolding buckle'1997D0315311'Wristwatch'1991D0314153'Wristwatch'1991D0312792'Wristwatch'1990D0310337'Wrist watch and band'1990D0310331'Combined watch and band'19904,497,584'Wrist watch case with vulcanized gasket'19854,198,811'Watertight watchcase having a removable polygonal hard glass'19803,978,710'Apparatus for determining the degree of gas impermeability for watch cases and the like articles'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976Patents assigned to OMEGA BRANDT & FRERES SA LOUIS (1)· patent assignee history
1976–2018Based in Bienne, CH· patent location history
1985Patents assigned to FINGER H FA (1)· patent assignee history
1990–1991Patents assigned to SEVERIN MONTRES AG (5)· patent assignee history
1997Patents assigned to GRANDJEAN S A (1)· patent assignee history
2008–2018Patents assigned to NAMIKI PRECISION JEWEL CO LTD (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SEVERIN MONTRES AG | 5 | 1990–1991 |
| NAMIKI PRECISION JEWEL CO LTD | 3 | 2008–2018 |
| FINGER H FA | 1 | 1985 |
| GRANDJEAN S A | 1 | 1997 |
| OMEGA BRANDT & FRERES SA LOUIS | 1 | 1976 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bienne, CH | 12 | 1976–2018 |