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| Number | Title | Issue Date |
| 5355571 | Method for opening a watch case and apparatus for practicing such method In order to open the watch case (1) by extraction of the crystal (2) such case is secured in an enclosure (3) after its stem and crown have been removed. Next, a suction cup (4) is applied to the crystal, such suction cup being maneuverable from outside t... | 10/18/1994 |
| 4589886 | Method of making part of a watch case In the manufacture of a watch case part comprising a glass and a middle having an opening for the glass, the following operations are carried out: first, a metallic coating is deposited on a peripheral portion of the glass, then one or more elements are f... | 05/20/1986 |
| 4558957 | Plastic watch casing with plastic crystal and process for joining the crystal to the casing To simplify fitting and sealing the crystal (4) to the casing (2, 6, 8), assembly is effected by means of ultrasonic welding. The casing (2, 6, 8) and the crystal (4) are made of synthetic materials which are thermo-weldable to each other. The mating face... | 12/17/1985 |
