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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 |
| 6914855 | Circuit for driving motor coils in stepping motors A circuit for selectively driving n motor coils associated with a plurality of stepping motors, wherein only (n+1) motor coil drivers are needed. A timepiece that utilizes such a circuit is also provided. ... | 07/05/2005 |
| 6400651 | Coil block protection structure and electronic device having coil block protection structure An electronic device has a battery for storing electric power, an electronic circuit driven by electric power from the battery, and a coil block for generating a magnetic field in accordance with a signal from the electric circuit. A protective film is co... | 06/04/2002 |
| 4407586 | Thin wrist-watch An electronic wrist-watch of greatly reduced thickness has extremely thin me indicating discs for which a special driving and guiding system is employed. Further, a single-phase motor is provided with at least two stator windings for reducing the watch's ... | 10/04/1983 |
| 4205262 | Electronic watch An electronic watch comprising a rotor magnetically connected to more than two poles, a stator composed of material of high magnetic transmission factor magnetically engaging with the rotor, means composed of coil magnetically connected to the stator and ... | 05/27/1980 |
| 4112671 | Pulse motor driving system for use in a timepiece Pulse motor driving system for use in a timepiece. The driving system has a single phase coil and permanent rotor which are stepped in a forward direction by a forward rotation driving voltage. The voltage is composed of a plurality of pulses having the s... | 09/12/1978 |
| 3958410 | Termination device from hairspring-hub to drive coil on two conductor hairspring The termination arrangement comprises a two conductor hairspring and/or hub arrangement in an electric watch for coupling drive pulses to a balance wheel drive coil. A metallic hairspring, which is fastened to the hub, has a conductor which is insulated f... | 05/25/1976 |
| 3950938 | Two conductor hairspring-hub arrangement for electric watches The two conductor hairspring-hub arrangement comprises a metallic and substantially conventional hairspring which is fastened to a unitary hub, i.e. a metallic washer-like hub, to form a core or inner conductor. This inner conductor is sheathed with an in... | 04/20/1976 |
| 3934403 | Fixation of double conducting hairspring The invention comprises an improved hairspring arrangement having a hairspring fixed in a groove of the hub in such a way that the hairspring protrudes from the groove, and furthermore, the protruding part of the hairspring should carry the electric condu... | 01/27/1976 |
