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| Patents for Theodore L. C. Howe | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 314,666 | Mar. 31, 1885 | W.H. Gray | Feed mechanism for wood-planing machines | |
 | 320,434 | Jun. 16, 1885 | W.H. Gray | Pulley and belt-shipper for machinery | |
 | 321,596 | Jul. 07, 1885 | W.H. Gray | Fastening for cutter-heads | |
 | 342,230 | May 18, 1886 | W.S. Doig, T.L. Smith | Box-nailing machine | |
 | 401,524 | Apr. 16, 1889 | J.F. Welch, E.F. Autenrieth | Feeding device for planing-machines | |