KV

Kalervo M. Virtanen

TO Teknoware Oy: 1 patents #8 of 14Top 60%
📍 Lahti, FI: #18 of 197 inventorsTop 10%
Overall (All Time): #1,302,261 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4976855 Oil collecting vessel 1990-12-11
4635032 Mobile door closure interrupting detector 1987-01-06
4460849 Device for regulating the power in electrical apparatuses, especially in fluorescent lighting fittings 1984-07-17
4228382 Power regulating inverter circuit 1980-10-14