EA

Emil Ackermann

OA Optrel Holding Ag: 2 patents #7 of 38Top 20%
Overall (All Time): #1,600,544 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6941577 Antiglare device for welding protective masks — 2005-09-13
5854667 Electrooptical filter cartridge and a method for manufacturing the same — 1998-12-29
5510609 Electrically controllable optical filter element — 1996-04-23