File:Patent Model for a Window Cleaning Chair.jpg

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Summary

Description
English: Invention by Anna Dormitzer. A model of her invention submitted with patent application in 1878. The model consists of a rectangular wooden frame with a glass-paned window opened to allow a wooden platform with hinged back to be placed underneath.
Date
Source Own work
Author FairyShrimp

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Captions

A model of chair that attaches to the window sill to make it safer to clean windows

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4 August 2016

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36 millimetre

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Date/TimeThumbnailDimensionsUserComment
current14:29, 7 March 2022Thumbnail for version as of 14:29, 7 March 2022600 × 665 (56 KB)FairyShrimpUploaded own work with UploadWizard

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