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English: US. 73,753. H. W. Poole. Key-board for Organs &c. 28.01.1868
Fig.2 Perspective view showing the relative position of all the Keys. |
Date | |
Source | U.S. Patent 73,753 |
Author | en:Henry Ward Poole |
Other versions | File:73753per.png |
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In general, the contents of United States patents are in the public domain.
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current | 16:47, 1 December 2005 | 400 × 245 (5 KB) | Mireut (talk | contribs) | US. 73,753. H. W. Poole. Key-board for Organs &c. 28.01.1868 Fig.2 Perspective view showing the relative position of all the Keys |
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