Shlesinger, Arkwright, Garvey & Fado
Flame retardant diaphragm for acoustic transducers
 A flame retardant diaphragm for speakers, etc. comprises an admixture of natural fibers and inorganic fibers. The admixture is impregnated with a thermosetting resin and an organic bromine compound, and heat-treated under pressure. The organic bromine compound acts as a flame retarder. 
Mogami Denki Kabushiki Kaisha Pioneer Electronic Corporation
D H
D06M H04R
inventional inventional
Fumio Kazuo Shigeru
Kawahara Tsuchiya Watanabe