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| Patents for Russell W. Porter | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,732,730 | Oct. 22, 1929 | R.W. Porter | Method and Apparatus for Measuring and Comparing Gears and the Like | ||
| 1,812,369 | Jun. 30, 1931 | R.O. Beardsley, R.W. Porter | Projecting Mechanism and Gear Staging Device | ||