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| All Patents in class 16/194 | |||||
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| Number | Date | Patentee | Title | Type | |
| AI243 | Jul. 26, 1859 | T.F. Hall | Window sash balancing | ||
| 86,034 | Jan. 19, 1869 | T.T. Prosser | Improvement in sash-balance | window sashes | |