Image: US519333-Window frame with sash (1)
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Original image (1,872 × 3,012 pixels, file size: 1.31 MB, MIME type: image/jpeg)
Description: Patent held by Margareth E. Knight
Title: US519333-Window frame with sash (1)
Credit: Google Patent
Author: Margareth E. Knight
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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