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Patents
Patents Assigned to LOUIS M. GERSON CO., IND.
Patents Assigned to LOUIS M. GERSON CO., IND.
Respirator mask
Patent number:
D849239
Type:
Grant
Filed:
December 8, 2017
Date of Patent:
May 21, 2019
Assignee:
LOUIS M. GERSON CO., IND.
Inventors:
Ronald L. Gerson, Pierre LaPointe