Patented September 27, 1932
| Patent | Title | Inventor |
|---|---|---|
| US 1,879,939 | ANIMAL TRAP | John U. Lehn and Mary A. Huebener |
And The World Did Not Beat A Path To His Door
4,400 attempts at a solved problem
| Patent | Title | Inventor |
|---|---|---|
| US 1,879,939 | ANIMAL TRAP | John U. Lehn and Mary A. Huebener |