This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see
Commons:Hirtle chart and
the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the
rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years
p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
* A search was conducted at copyright.gov using the company's name, Topps. The search revealed no renewals of any of the company's cards-only registrations of their more current sports ones. There is no evidence the company continues to claim on this material.