Paavo Piiroinen

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Joensuu, FI

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Patents Grantslast 30 patents

Information Patent Grant
Door lock
- Patent number 4,902,053
- Issue date Feb 20, 1990
- Oy Wartsila AB
- Reijo Hakkarainen
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Slipping cylinder lock
- Patent number 4,370,875
- Issue date Feb 1, 1983
- Oy Wartsila AB
- Paavo Piiroinen
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Cylinder lock
- Patent number 4,317,347
- Issue date Mar 2, 1982
- Oy Wartsila AB
- Kaarlo Martikainen
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES