Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7066671 | Method for forming perforations in a sheet of media with a perforation system A method for forming perforations in a sheet of media with a perforation system includes the steps of generating graphics data; defining a non-printed color to represent perforation locations; embedding the non-printed color in the graphics data for a current perfor... | 06/27/2006 |
| 5842794 | Perforating device and process for setting perforating devices A perforating device for the representation of letters and numbers with adjustable perforating gearwork and with a drive for the perforating gears for rapid shifting of letters and numbers and to a process for setting perforating devices. The perforating ... | 12/01/1998 |
