Witwe A.E. Kunz-Marti, CH21931A
An einem Waschzuber anbringbarer Auswindeapparat für Scheuerlappen.
Image credit: Kunz-Marti, W.A.E. (1901)
On October 31, 1901, Witwe Anna Elisabetha Kunz-Marti of Biberist, Switzerland, patented a tub-mounted wringer with adjustable rollers to squeeze floor cloths, even while attached to scrub brushes. Its foldable design and guiding plates made cleaning easier and more hygienic.
Date of Application: 17 February 1901
Date of Issuance: 31 October 1901
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.