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| US4342521 | 23 déc. 1980 | 3 août 1982 | Adlerwerke vorm Heinrich Kleyer A.G. | Paper feeding apparatus |
| US4383772 | 15 juin 1981 | 17 mai 1983 | Triumph-Adler A.G. fur Buro- und Informationstechnik | Support for the paper carrier in typewriters and similar machines |
| US4620482 | 3 oct. 1984 | 4 nov. 1986 | M.A.N.-Roland Druckmaschinen Aktiengesellschaft | Rotary printing machine cylinder blanket construction and insertion tool |
| US5980132 | 1 déc. 1997 | 9 nov. 1999 | Canon Kabushiki Kaisha | Image forming apparatus with means for maintaining constant distance between recording head and recording sheet |
