Patent Model - Window-Cleaning Step-Chairs

Maker and role
Anna Dormitzer (b.1830, d.1903), Patentee
Production date
Aug 13 1878
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Object detail

Wood, brass, paper
12 1/2 x 5 1/2 x 4" (31.8 x 14 x 10.2cm)
Dormitzer's patent "is an improvement on the window-cleaning chair for which Letters Patent No. 200,441 were granted" to her February 19, 1878. Her alterations rendered "the window-cleaning chair lighter and more portable, to simplify its adjustment, and to render it stronger and more reliable and complete." (Patent Number 206,926)
Object number
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