Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 4017217 | Overspeed protection system A protection system to prevent the failure of a flywheel caused by an overspeed condition of a fluid pump. A positive displacement pump is coupled to, and driven by, the drive shaft of the fluid pump, and the positive displacement pump circulates a fluid ... | 04/12/1977 |
