File:United States patent 766474.pdf
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Original file (1,158 × 1,702 pixels, file size: 3.44 MB, MIME type: application/pdf, 28 pages)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:46, 27 June 2024 | 1,158 × 1,702, 28 pages (3.44 MB) | RaboKarbakian | {{Book |Description=Telegraph system |Source=https://patents.google.com/patent/US766474A/en |Image page = 8 |other_versions= |wikidata = Q126917670 }} {{PDF}} {{PD-scan|PD-US-expired}} Category:United States patent 766474 |
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