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| Patents for Haydon C. Thomas | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,728,626 | Apr. 17, 1973 | H.C. Thomas, A.T. Douglas | Electronic Measuring System | electrical measuring apparatus | |
| 4,081,801 | Mar. 28, 1978 | H.J. Keen, H.C. Thomas | Electronic Measuring System with Pulsed Transducer | electrical measuring apparatus | |
| 4,238,784 | Dec. 09, 1980 | H.C. Thomas, H.J. Keen | Electronic Measuring System with Pulsed Power Supply and Stability Sensing | electrical measuring apparatus | |