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 |
| 7117897 | Method and face-to-face weaving machine for face-to-face weaving of an upper and lower fabric A method and apparatus for face-to-face weaving of an upper and a lower fabric on a face-to-face weaving machine, upper and lower fabric (101, 102) comprising at least a first zone with pile loops, the pile loops being formed around one or several lost pile l... | 10/10/2006 |
| 7111647 | Weaving machine and method for weaving pile fabrics and spacer for such a weaving machine A weaving machine weaves pile fabrics having weft yarns, backing warp yarns, and pile warp yarns. One or several spacers extend between the pile warp yarns either to realize a constant pile height between two pile fabrics formed, or to determine the pile loop height... | 09/26/2006 |