Talk:Norton Isolastic frame

Latest comment: 11 years ago by 84.178.153.18 in topic Isolastic derived from featherbed

Isolastic derived from featherbed

edit

Can someone please explain how the isolastic frame is derived from the featherbed? It is different in just about every aspect imaginable and was a clean sheet design, so where is the derivative nature of it? — Preceding unsigned comment added by 84.178.153.18 (talk) 16:58, 31 December 2012 (UTC)Reply