File:US22770 David E. Hughes Patent.pdf
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US22770_David_E._Hughes_Patent.pdf (file size: 743 KB, MIME type: application/pdf)
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 17:17, 12 December 2019 | (743 KB) | Hswarford (talk | contribs) | Be it known that I, David E. Hughess, of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Telegraphing Machines; and I do hereby declare that the following is a full, clear, and exact descriptio... |
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