Front loading variable depth picture frame

作者: A Rochman

DOI:

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摘要: A framework structure is provided whereby pictures may be mounted through the frontal plane of a quadrilateral frame, with bracket means being upon frame for attachment to rear side picture. The are adjustably spaced relative enable adjustability picture frame.

参考文章(2)
Lazzaro V Villani, License holding bumper construction ,(1962)
Edgar H Bristol, Retainer for glazings and the like ,(1925)