Seiji Umezawa

Follow

Person

Tanashi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Structure for a watch case made of cemented carbide
- Patent number 4,496,248
- Issue date Jan 29, 1985
- Citizen Watch Company Limited
- Masahiko Waki
- G04 - HOROLOGY
Information Patent Grant
Joint structure of bezel and watch body
- Patent number 4,408,900
- Issue date Oct 11, 1983
- Citizen Watch Company Limited
- Tsuneji Takasugi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for fabricating a watch case
- Patent number 4,382,172
- Issue date May 3, 1983
- Citizen Watch Co., Ltd.
- Tsuneji Takasugi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR