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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4265551 | Drive for transporting and reversing an ink ribbon, and for withdrawing the printing head in printing devices In order to enable ink ribbon transport and ribbon reversal on the one hand and on the other hand the withdrawal of the printing head from the platen to be performed by means of only a single motor, a pawl-and-ratchet device is provided between the drive ... | 05/05/1981 |
| 4165191 | Web feed, web cutting and ribbon feed means for a stationery mosaic printer This invention is concerned with a mosaic printer, for example, of the needle print head type which comprises a stationary print head and means for feeding an article, for example a web of paper to be printed, in a direction orthogonal to a row of print d... | 08/21/1979 |
| 4083445 | Ribbon reversal mechanism for an office machine A mechanism for reversing the movement of an inked ribbon in an office printing machine or the like comprising first and second rotors each for effecting the rotation of one of two ribbon spools on which the ribbon is mounted and a driving element for alt... | 04/11/1978 |
| 4033445 | Ribbon feed device for office machines A ribbon feed device for a ribbon in a cartridge, comprises means for supporting the cartridge with spools therein engaged on hubs of the device, guide means for guiding a length of ribbon looped out of the cartridge, and a single control member operable ... | 07/05/1977 |
