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| Patents for Thomas Cowan | |||||
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| Picture | Number | Date | Patentee | Title | |
 | CA-5,951 | Apr. 10, 1876 | D. Cameron, J. Ballantine | Rotary bed moulding machine | |
| CA-11,493 | Jul. 15, 1880 | D. Cameron, T. Cowan, J. Ballantine | Improvements in wood planing machines | ||
| CA-11,494 | Jul. 15, 1880 | T. Cowan, J. Ballantine, D. Cameron | Improvements in rotary bed planers | ||
 | CA-12,420 | Feb. 26, 1881 | T. Cowan, J. Ballantine | Spring guard adjusters for moulding machines | |
 | CA-12,786 | May 13, 1881 | T. Cowan, J. Ballantine | Planing machine | |