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| All Patents in class 74/832 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 728,364 | May 19, 1903 | R.L. Campbell | Valve Gear for Steam Engines | ||
| 1,008,405 | Nov. 14, 1911 | A.D. Baker | Variable Cut-Off Valve Gear for Engines | ||
| 1,036,057 | Aug. 20, 1912 | A.D. Baker | Valve-Gear for Locomotive-Engines | ||
| 1,036,058 | Aug. 20, 1912 | A.D. Baker | Reversible Variable Cut-Off Valve Gear for Locomotives | ||
| 2,082,092 | Jun. 01, 1937 | A.D. Baker | Auxiliary Gear Mechanism | ||