Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6494631 | Printer with ribbon fold out mechanism A ribbon mechanism mounted in the lid of a printer includes a ribbon carriage pivotally coupled to the lid for folding out of the lid by virtue of its mass when the lid is open and for folding in the lid as the lid is closed. A gear train is mounted on th... | 12/17/2002 |
| 5863139 | Printing apparatus and a control method therefor A printing apparatus comprises a platen, a dot impact print head (23) opposite to the platen, a mask plate (40) between the platen and the print head with a paper passage between the platen and the mask plate (40), and an ink ribbon (31) between the print... | 01/26/1999 |
| 5588755 | Unwinding apparatus for unwinding tape-like sheet member In the present invention, an unwinding shaft in a cassette is rotated to unwind a sheet member by an unwinding mechanism in connection with a movement of a head attaching member when the head attaching member is such a direction as to separate the head me... | 12/31/1996 |
| 4784502 | Thermal printer In a thermal printer including a thermal head, an ink ribbon interposed between the thermal head and a recording paper, the thermal head generating heat for effecting printing, and a movable ink ribbon guide for guiding the ink ribbon provided on a downst... | 11/15/1988 |
| 4753545 | Replaceable ribbon cartridge for printers In a replaceable ribbon cartridge (12) for printers in which the ribbon (14) can be guided out of the cartridge through an exit opening (16) and at the end of a tension segment extending outside the cartridge can be reintroduced into the cartridge through... | 06/28/1988 |
| 4119385 | Ribbon changing mechanism for a typewriter In a ribbon changing mechanism, a ribbon retaining portion of the ribbon vibrator lifts a printing ribbon from a lowered non-printing position to an elevated printing position, in response to the printing operation. When a push button is depressed for ret... | 10/10/1978 |
