Todor Yankov Koychev

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Sofia, BG

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for coating graphite electrodes
- Patent number 4,259,919
- Issue date Apr 7, 1981
- DSO "Cherna Metalurgia"
- Todor Y. Koychev
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Contact clamp for graphite electrodes
- Patent number 4,101,186
- Issue date Jul 18, 1978
- DSO "Cherna Metalurgia"
- Georgi Metev Georgiev
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Apparatus for the application of a protective coating to a graphite...
- Patent number 4,077,357
- Issue date Mar 7, 1978
- DSO "Cherna Metalurgia"
- Vassil Georgiev Peev
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...