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| US4122983 | 4 oct. 1976 | 31 oct. 1978 | | Versatile dispensing dental hygiene and shaving device | | US6056162 | 28 oct. 1998 | 2 mai 2000 | Spectronics Corporation | Self-contained service tool for adding fluorescent leak detection dye into systems operating with pressurized fluids |
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