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| Patents for William Foster | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,853 | Nov. 21, 1842 | W. Foster | Machine for cutting shingles | shingle machines | |
| 3,252 | Sep. 01, 1843 | W. Foster | Machine for cutting veneers | veneer machines | |
| 3,355 | Nov. 24, 1843 | W. Foster | Soapstone Oiler for Bench Plane | plane oilers | |
| AI68 | Mar. 16, 1844 | W. Foster | Bench Plane Oiler Using Soap, Beeswax, or Tallow. | plane oilers | |
| 433,200 | Jul. 29, 1890 | W.H. Millward, W. Foster | Steam Actuated Valve | steam engine valve gear | |