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 |
| 4346641 | Apparatus for automatically turning the pages of a music box The invention relates to an apparatus for automatically turning the pages of a music book which consists of a music book stand, a number of page turning slats piled one over another and pivoted at the top of the music book stand, each of said slats being ... | 08/31/1982 |
