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 |
| 4557475 | Cushioned activity surface with closed cell foam pad bonded to hard surface and rubber mat An activity field is surfaced with a cushioned, resilient rubber mat over a hard undersurface. One area of the field is subject to participant impact potentially resulting in injury. That area is provided with a closed cell shock absorbing foam pad betwee... | 12/10/1985 |
| 4505039 | Seaming tool for floor coverings The seaming tool has elongated upper and lower plates hinged along their long edges to open like a book. The bottom of the lower plate has stops parallel to the hinge. The stops engage the edge of already laid floor covering and the to-be-laid material is... | 03/19/1985 |
