File:US patent 1682572.pdf
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Summary
Carl W. Keuffel: United States patent 1682572
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| Author |
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| Title |
United States patent 1682572  |
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| Object type |
United States patent / document |
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| Description |
Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer). |
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| Language |
English |
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| Date |
15 October 1925 |
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| Publication date |
28 August 1928 |
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| Source | https://patents.google.com/patent/US1682572 | |||||||||||||||||
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Licensing
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:39, 11 February 2024 |  | 1,158 × 1,702, 10 pages (953 KB) | RaboKarbakian | {{Information |Description=Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer). |Source=https://patents.google.com/patent/US1682572 |Date=1925-10-15 |Author=C. W. Keuffel |Permission= |other_versions= }} {{PDF}} Category:United States patent 1682572 Category:Carl W. Keuffel Category:Spectrophotometers |
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- Page:US patent 1682572.pdf/1
- Page:US patent 1682572.pdf/10
- Page:US patent 1682572.pdf/2
- Page:US patent 1682572.pdf/3
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- Page:US patent 1682572.pdf/6
- Page:US patent 1682572.pdf/7
- Page:US patent 1682572.pdf/8
- Page:US patent 1682572.pdf/9
- Index:US patent 1682572.pdf
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