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| Patents for John Stevens Jr. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 31X | Aug. 26, 1791 | J. Stevens, Jr. | Boiler for generating steam | ||
| 32X | Aug. 26, 1791 | J. Stevens, Jr. | Raising water by steam | ||
| 33X | Aug. 26, 1791 | J. Stevens, Jr. | Application of steam to work bellows | ||