Tapio Ritvanen

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Turku, FI

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Patents Grantslast 30 patents

Information Patent Grant
Cabin element system for ships
- Patent number 4,528,928
- Issue date Jul 16, 1985
- Oy Wartsila AB
- Hannu Virta
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Method and arrangement for treating gaseous combustion products
- Patent number 4,323,371
- Issue date Apr 6, 1982
- Oy Wartsila AB
- Tapio Ritvanen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL