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| Patents for William C. Howell | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,149 | Jan. 19, 1858 | C. Moore | Press for Packing the Pulp of Linseed or Other Seeds Preparatory to Extracting the Oil from Them | ||
| D34,937 | Aug. 13, 1901 | H.T. Henderson | Design for a bed-plate for tire-setting machines | steel tire shrinkers | |