Image: Patent Model for a Window Cleaning Chair
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Description: 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.
Title: Patent Model for a Window Cleaning Chair
Credit: Own work
Author: FairyShrimp
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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