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The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women. [44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker , widened the teeth.
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
This is a historical list dealing with women scientists in the 20th century. During this time period, women working in scientific fields were rare. Women at this time faced barriers in higher education and often denied access to scientific institutions; in the Western world, the first-wave feminist movement began to break down many of these ...
Early 12th century: Dobrodeia of Kiev (died 1131), a Rus' princess and Empress of the Eastern Roman Empire, was the first woman to write a treatise on medicine. [14] Early 12th century: The Italian medical practitioner Trota of Salerno compiled medical works on women's ailments and skin diseases. [15]
In the US, in 1954, only 1.5% of patents named a woman, compared with 10.9% in 2002. [1] Women's inventions have historically been concentrated in some areas, such as chemistry and education, and rare in others, such as physics, and electrical and mechanical engineering. [1]
On International Women’s Day, here’s a look at some of the most important inventions created by women. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800 ...
Calculated on the basis of the current number of doctoral students, the government hopes to obtain a 20% share of women in science, 15% in engineering and 30% in agriculture and health by the end of the current Basic Plan for Science and Technology in 2016. In 2013, Japanese female researchers were most common in the public sector in health and ...
In 1904, Geer founded the Geer Manufacturing Company to develop her design for medical syringes. She invented the nasal speculum and a retractor. [4] Her invention inspires modern-day syringes. [3] She became an activist and was involved with the National American Woman Suffrage Association. [4]