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 |
| 5897038 | Liquid dispensing wagon A utility wagon or toy version thereof for containing a source of dispensable liquid and having a pump mounted in the wagon for pressurizing the source of liquid by actuating a reciprocally movable handle, and a wand connected to the source of liquid for ... | 04/27/1999 |
| 4219047 | Telescoping eduction pipe assembly with elastomeric boot An eduction pipe and sump arrangement which does not require a skid includes an eduction pipe extending down from the top of the car and terminating a sufficient distance above the tank bottom to accommodate tank flexure. A sump is formed in the tank bott... | 08/26/1980 |
