"The binder clip was invented in 1910 by Washington resident Louis E. Baltzley, who ultimately was granted U.S. Patent 1,139,627 for his invention."
https://en.wikipedia.org/wiki/Binder_clip
"The binder clip was invented in 1910 by Washington resident Louis E. Baltzley, who ultimately was granted U.S. Patent 1,139,627 for his invention."
https://en.wikipedia.org/wiki/Binder_clip