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 |
| 7286152 | System and method for efficient donor material use A method for operating more than one thermal printer adapted to print images by transferring donor material from patches of donor material from a donor ribbon onto a receiver medium, each printer being operable to print images in a manner that exhausts a full donor ... | 10/23/2007 |
| 6919912 | Method of registering the position of a ribbon moving at a constant angular velocity and detecting the amount of the ribbon used in a photo printer A method of registering the position of a ribbon by moving the ribbon with a constant angular velocity and detecting the amount of ribbon used in a photo printer. The ribbon includes dye regions each having several dye frames, and black bar regions each prior to a d... | 07/19/2005 |
| 5533819 | Character by character thermal recording device with ink sheet feed control A thermal recording device suitable for use in an electronic typewriter for printing characters on a printing paper by means of an ink sheet. The device has a thermal recording head adapted to be pressed onto the printing paper through the ink sheet so as... | 07/09/1996 |
| 4131374 | Dual segment continuous motion ribbon feed mechanism A ribbon feed mechanism for typewriters operable to incrementally feed a ribbon with a dual segment continuous motion ribbon feed. The ribbon is advanced an initial segment by a power actuated linkage and advanced a final segment by a spring urged arm act... | 12/26/1978 |
