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| All Patents in class 48/102A | |||||
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| Number | Date | Patentee | Title | Type | |
| 15,153 | Jun. 17, 1856 | J. Tear | Method of operating cutters in their heads for irregular forms | cutterheads | |
| 480,535 | Aug. 09, 1892 | G.W. Weatherhogg | Petroleum or Similar Engine | ||
| 735,376 | Aug. 04, 1903 | F.G. Hobart | Crude Oil Vaporizer | evaporating apparatus | |