File:US pat 5589909 fig 2.png
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![File:US pat 5589909 fig 2.png](https://upload.wikimedia.org/wikipedia/commons/thumb/5/55/US_pat_5589909_fig_2.png/800px-US_pat_5589909_fig_2.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:52, 6 June 2007 | ![]() | 2,240 × 1,624 (75 KB) | commons>Shotgunlee | US patent 5589909 fig 2 phase detection system |
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