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 |
| 6752109 | Ignition electrode arrangement at an internal combustion engine In an ignition electrode arrangement at a cylinder in an internal combustion engine, for example an Otto-engine, a first electrode and a second electrode co-operate with each other, the first electrode being arranged on an ignition device secured to a cylinder head.... | 06/22/2004 |
| 6712033 | Spark electrodes with adjustable gap In an ignition electrode arrangement for a cylinder in an internal combustion engine, for example an Otto engine, a cylinder head (3) bears a first electrode (7) and a second electrode (8) which interact with one another. At least the first elec... | 03/30/2004 |
