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| Patents for Henry B. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,681,797 | Aug. 21, 1928 | H.B. Allen | Alloy Steel | steel maker | |
| 2,013,943 | Sep. 10, 1935 | H.B. Allen | Circular Saw | circular saws | |
| 2,074,296 | Mar. 16, 1937 | H.B. Allen | Apparatus for Making Composite Metals | ||