DescriptionPatent Model for a Window Cleaning Chair.jpg
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.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.