PH

Pertti Helle

📍 Maaninka, FI: #1 of 3 inventorsTop 35%
Overall (1997): #50,073 of 185,788Top 30%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5632916 Laser marking method and a metal surface marked by this method Reijo Lappalainen, Sten Sirén, Teijo Salmi 1997-05-27