Yrjo Aho

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Westend, SF

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Patents Grantslast 30 patents

Information Patent Grant
Fixing arrangement for the sealing pad on the ear hood of a hearing...
- Patent number 4,057,856
- Issue date Nov 15, 1977
- Exel Oy
- Yrjo Aho
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Snow disk for a ski staff
- Patent number 3,963,254
- Issue date Jun 15, 1976
- Exel Oy
- Yrjo Aho
- A63 - SPORTS GAMES AMUSEMENTS