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 |
| 5178544 | Graphic method for reporting risk to a patient A graph comprising a distribution curve for displaying a distribution of test results for given population and a density gradient superimposed over the distribution curve for displaying and probability of an event or condition occurring for each such test... | 01/12/1993 |
| 5037305 | Graphic method for reporting risk to a patient A graph comprising a distribution curve for displaying a distribution of test results for given population and a density gradient superimposed over the distribution curve for displaying the probability of an event or condition occurring for each such test... | 08/06/1991 |
