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| All Patents in class 84/184 | |||||
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| Number | Date | Patentee | Title | Type | |
| 55,385 | Jun. 05, 1866 | W. Steinway | Improvement in piano-fortes | music instrument maker | |
| 97,982 | Dec. 14, 1869 | C.F. Steinway | Improvement in piano-fortes | music instrument maker | |