Assignee

VERTO NV

2 patents

Top patents by PatentIndex Score

US3998916ADec 21, 1976

Method for the manufacture of an electret fibrous filter

VERTO NV94 citations94

US4178157ADec 11, 1979

Method for manufacturing a filter of electrically charged electret fiber material and electret filters obtained according to said method

VERTO NV51 citations91