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 |
| 6682233 | Supporting structure of an armature of a wire dot printer head In a wire dot printer head of the present invention, an armature is formed by coupling a magnetic circuit formation member having a supported piece with one end inserted into a cavity formed on a surface of a yoke to an arm coupled to a wire. The supporte... | 01/27/2004 |
| 5413421 | Printing head device A printing head device according to the present invention includes a plurality of printing pins corresponding to respective dots, a plurality of first pin drive plates having the printing pins fixed thereon and having surfaces on which first electrodes ar... | 05/09/1995 |
| 4711170 | Printing wire driving device in wire dot printer The present invention relates to a printing wire driving device in a wire dot printer which can perform accurate control with small power and has a large printing wire driving power. In the present invention, a driving member is driven by an eccentric cam... | 12/08/1987 |
| 4172671 | High speed printer having a pneumatically actuated printing head A high speed printing device having a printing head provided with printing needles. The printing device is mounted on a movable carriage which is adapted to move adjacent to a recording medium. The printing head is pneumatically operated and also is movab... | 10/30/1979 |
| 3955498 | Electromagnetically actuated printer A device for printing in association with hand-held calculators comprises a pair of vertically stacked blocks joined by a elastomer layer, the lower block formed of elastic material. Vertically embedded in the lower block is an array of digit forming segm... | 05/11/1976 |
