Karl L. G. Lumen

SA Sandvik Ab: 2 patents #28 of 180Top 20%

📍 Sandviken, SE: #105 of 247 inventorsTop 45%

Overall (All Time): #2,371,703 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4289211	Rock drill bit	—	1981-09-15
4181187	Rock drill bit with stress relief insert sockets	—	1980-01-01