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| Number | Title | Issue Date |
| 7262351 | Piano hammer A piano hammer comprises an elongate hammer head having a nose portion defining side surfaces and a felt covering extending about the nose portion with tail portions of the felt covering affixed to the side surfaces. The felt covering defines a substantially ellipti... | 08/28/2007 |
| 4135430 | Piano hammer In a coupling construction of a wooden base with a striking head of a piano hammer, at least one gap is left between a longitudinal end of the striking head and the longitudinal end face of the wooden base which serves as a refuge for unexpected deformati... | 01/23/1979 |
