1941 John D. Lincoln proposes the use of expanded paper honeycombs for aircraft radomes 1948 Roger Steele applies the expansion production process using fiber reinforced composite sheets. 1969 Boeing 747 incorporates extensive fire-resistant honeycombs from Hexcel Composites using DuPont's Nomex aramid fiber paper. 1980s Thermoplastic honeycombs produced by extrusion processes are introduced.