73747708
Aug 22, 1988
Jan 30, 1990
EQUIPMENT AND DEVICES FOR THE PROTECTION OF HUMAN EYES FROM RADIATION, PARTICULARLY [ PROTECTIVE EYE GLASSES; ] PROTECTIVE EYE [ SHIELDS, SHADES AND ] HELMETS FOR WELDERS; [ SUN GLASSES, ] OPTICAL FILTERS, PARTICULARLY ABSORPTION FILTERS, INTERFERENCE FILTERS, REFLECTION FILTERS, INFRARED FILTERS, ULTRAVIOLET FILTERS, POLARIZATION FILTERS, OPTICAL FILTERS AND OPTICAL FILTER ARRAYS WHICH ARE CONTROLLABLE WITH REGARD TO THE TRANSMISSION RATE; APPARATUS FOR THE CONTROL OF THE RATE OF TRANSMISSION OF RADIATION FOR CONTROLLABLE FILTERS AND FILTER ARRAYS, ACCESSORIES AND PARTS OF THE AFOREMENTIONED GOODS
Electrical and Scientific Apparatus