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| Number | Title | Issue Date |
| 6526870 | Fluid pressure cylinder A circular piston and a noncircular rod are separately formed as separate parts and the piston and the rod are integrally connected to each other through an adhesive in a state in which the piston is aligned to be concentric with a circular bearing hole o... | 03/04/2003 |
| 4357756 | Magnetic compass A magnetic compass comprises a case having a transparent cover and a magnetic compass card having a hub, which is rotatably supported on a central shaft projecting up from the base of the case by bearings comprising a thrust bearing between the hub and th... | 11/09/1982 |
| 3950964 | Support assembly of vertical rotor A support assembly of the vertical rotor comprises a drive shaft connected with the rotor shaft by means of an elastic support which provides the rotor with self-centring in the course of its rotation. This support is formed by two groups of elastic components... | 04/20/1976 |