File:United States patent 446529 - Fig 1 - 4.png
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current | 21:30, 26 May 2021 | 1,064 × 802 (144 KB) | Sp1nd01 | Uploaded a work by William Shakespeare and Garrett W. Low from https://en.wikisource.org/wiki/Index:Photographic_Shutter_(Low_%26_Shakespeare).pdf with UploadWizard |
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