File:US Patent 1240890.pdf
Original file (1,275 × 1,650 pixels, file size: 19.86 MB, MIME type: application/pdf, 9 pages)
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Summary
[edit]DescriptionUS Patent 1240890.pdf |
English: "Sun-Boiler" 1917 patent by Frank Shuman and Charles Vernon Boys - similar to modern parabolic trough solar power plants |
Date | |
Source | US Patent |
Author | Frank Shuman and Charles Vernon Boys |
Licensing
[edit]Public domainPublic domainfalsefalse |
In general, the contents of United States patents are in the public domain.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:13, 16 July 2012 | 1,275 × 1,650, 9 pages (19.86 MB) | Apteva (talk | contribs) |
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Conversion program | OpenOffice.org 3.3 |
Encrypted | no |
Version of PDF format | 1.4 |
Page size | 612 x 792 pts (letter) |