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An Extensible Brattice System for Face Ventilation.
Divers-EF; Monaghan-DA; Berry-R
U S Patent 1979 Dec; (4):
Issue of Publication
U.S. Patent No. 4,180,352, December 25, 1979
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division