Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 5012754 | Open-bottom gravel dump boat A hull construction of a cargo carrier vessel, with self-propelling capacity, capable of carrying earth, sand, quarried stones and so forth and of disposing of them from the bottom is disclosed. While the bottom (11) is released, the hold forms a double-h... | 05/07/1991 |
