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 |
| 4288880 | Bee vacuum device and method of handling bees A bee handling device and method for removing worker, drone and queen bees from a comb includes a chamber having an entrance opening of a size to pass a comb frame and attendant bees. The chamber is subjected to vacuum drawing in air currents flowing acro... | 09/15/1981 |
