Inventor
ACKERMANN EMIL
CH3 patents
Patents
3 patentsUS5510609AApr 23, 1996
Electrically controllable optical filter element
OPTREL AG30 citations87
US6941577B2Sep 13, 2005
Antiglare device for welding protective masks
OPTREL AG10 citations68
US5854667ADec 29, 1998
Electrooptical filter cartridge and a method for manufacturing the same
OPTREL AG10 citations68