File:Campus Guns.jpg

This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. 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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties. العربية ∙ беларуская (тарашкевіца) ∙ čeština ∙ Deutsch ∙ Ελληνικά ∙ English ∙ español ∙ français ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ ไทย ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

The photo was published simultaneously in many newspapers, some of which had no copyright notice at all (neither for the photo in particular, nor for the newspaper as a whole). For example:

• The Capital Times
• The Des Moines Register
• The Charlotte News
• Detroit Free Press
• Fort Worth Star-Telegram
• The South Bend Tribune
• St. Petersburg Times
• The Arizona Republic
• Dayton Daily News

Also published without copyright notice in (1976) The Instant It Happened, H.N. Abrams & The Associated Press, p. 211 . (The book contained only an "All Rights Reserved" notice, which is not a valid copyright notice under US law.)

Copyright was therefore forfeited per section 9 of the Copyright Act of 1909, which required that notice of copyright be affixed to every published copy.