Who was credited with the invention of silly putty in 1942?

Silly putty is trademarked by Crayola. Some say it was invented by Earl L. Warrick who worked for Dow Corning. Crayola says it was invented by James Wright, who was an engineer working for General Electric in 1943. Peter Hodgson took some of what James Wright made to the International Toy Fair in 1950. It became a very popular toy because it bounced.