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| Patents for Thwaites Bros., Ltd. | |||||
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| Number | Date | Patentee | Title | Type | |
| 44,892 | Nov. 01, 1864 | P.H. Roots | Improvement in blower-cases | blowers | |
| 56,614 | Jul. 24, 1866 | P.H. Roots, F.M. Roots | Improvement in cross-heads for blowers | blowers | |
| RE2,369 | Oct. 02, 1866 | P.H. Roots | Improvement in blowers | blowers | |