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 |
| 4315135 | Thermal recording head A thermal recording head comprises a supporting substrate having a wiring pattern wherein a plurality of heating elements arranged linearly and a plurality of lead-out wires connected respectively to each heating element are formed on the end surface and ... | 02/09/1982 |
