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| Number | Title | Issue Date |
| 4613241 | Printing mechanism for dot matrix printers A dot-type printer of the type using printing pins or wires is improved by employing a driving system which includes a variable-volume sealed container enclosing a pressure transmitting medium. Electrodes are disposed in the medium and are closely spaced ... | 09/23/1986 |
| 4415284 | Thermal die-cutting machine for die-cutting letters, numerals and other characters from plastic tape An improved machine for heating and die cutting plastic tape to form letters, numerals and other characters is disclosed which includes a rotatable disc-shaped print plate which defines a plurality of raised characters spaced in a circle on and around one... | 11/15/1983 |
