Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6295748 | Apparatus for turning over individual sheets assembled to form a stack In an apparatus for turning over individual sheets assembled to form a stack, preferably for leafing through program tiles of a jukebox, the sheets are arranged to pivot about mutually parallel pivot pins and are provided with projections rising above the... | 10/02/2001 |
