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| Pendulum scale | Odometer for vehicles |
| US Patent No. 236393 (1882) | US Patent No. 315727 (1885) |
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| Barometer | Portable weighing-scale |
| US Patent No. 359057 (1887) | US Patent No. 570553 (1896) |
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| Oven thermometer | Electric clock |
| US Patent No. 1069647 (1913) | US Patent No. 1911062 (1933) |
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| Atomic clock | Multimeter |
| US Patent No. 2699503 (1949) | US Patent No. 3194073 (1955) |
giovedì 16 agosto 2012
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