Category:Invention of the telephone
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Media in category "Invention of the telephone"
The following 9 files are in this category, out of 9 total.
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A Bell drawing showing a liquid transmitter from March 8, 1876.jpg 794 × 801; 109 KB
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Bell's drawing for Patent 161739 granted by U.S. PTO in April 1875.jpg 1,467 × 469; 49 KB
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Bell's October 1873 experiments using a liquid transmitter.jpg 300 × 300; 10 KB
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Bell's tuning fork sounder, 1872.jpg 300 × 308; 14 KB
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P.D. Richards drawing of Bell experiments in early 1873.jpg 3,171 × 2,186; 375 KB
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Zenas-fisk-wilber-affidavit.png 934 × 2,891; 1.49 MB
