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 |
| 4716609 | Domicile for leaf cutter bees A domicile for leaf cutter bees includes front, end and rear panels, a base and top panel and a lid of weather resistant material. The domicile is supported on legs which are fitted to the end panels and to each of which there is fitted an angle bracket c... | 01/05/1988 |
