Corrected entry: When Christopher Reeve is looking backstage for the amazing Elise McKenna, we see a number of plywood stage items. Set in 1912, this action predates the invention of plywood - 1933. There are also extruded aluminium door controllers on many doors.
J I Cohen
27th Aug 2001
Correction: Modern plywood was invented in the mid-19th century, and was in common use before 1900. See: http://www.gp.com/build/newsRelease.aspx?NewsID=2372.
J I Cohen