File:EdithClarkeCalculatorUSPatentDrawing.png
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This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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Summary
| Description |
English: A graphical calculator for calculating electrical quantities in transmission lines. |
| Date | |
| Source | US Patent |
| Author | A. G. Davis (Attorney), Edith Clarke |
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.
 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings. |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 01:12, 7 June 2023 | 608 × 912 (212 KB) | User-duck | Cropped 26 % horizontally, 22 % vertically using CropTool with lossless mode. |
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