Publication of Bentz’s coffee filter model in Patent Gazette.
On July 8, 1908, the German Imperial Patent Office granted and announced the utility model for Melitta Bentz’s coffee filter in the Patent Gazette. This event confirmed legal protection of her innovative design, allowing Bentz to commercialize her idea without fear of imitation. The publication in the Patentblatt marked recognition from official institutions, underscoring the validity and potential of her kitchen-table invention.