Per-Ake Hellman

AA Asea Aktiebolag: 1 patents #94 of 307Top 35%

📍 Idkerberget, SE: #2 of 3 inventorsTop 70%

Overall (All Time): #4,023,251 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4547831	Surge arrester	Lennart Stenstrom	1985-10-15