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searching for 1937 in Switzerland 2 found (8 total)

Electric toothbrush (3,982 words) [view diff] no match in snippet view article find links to article

a patent was filed by his company, Motodent Inc. on December 13, 1937. In Switzerland in 1954 Dr. Philippe Guy Woog invented the Broxodent. Woog's electric

Freinet Modern School Movement (286 words) [view diff] no match in snippet view article find links to article

(Wallonia), there is a branch under the name Éducation populaire since 1937. In Switzerland, in 1998 the Swiss Group of the Modern School united three smaller