Petra Wadström (born 20 February 1952) is a Swedish inventor of a water purification device called Solvatten, which is a portable device that heats and...
5 KB (397 words) - 04:52, 1 June 2024
which uses sunlight to purify water for drinking. It was invented by Petra Wadström and was intended mainly for domestic use in the developing world. Provided...
3 KB (273 words) - 16:35, 23 September 2023
telephony Maria Romell (1859-1949), heat-insulated food container and more Petra Wadström (b.1952), inventor of Solvatten Ursula Keller (born 1959), laser technology...
23 KB (2,604 words) - 13:28, 11 August 2024
Nordic Mobile Telephone dialing procedure 2011 Georgios Psaros 2013 Petra Wadström Solvatten 2014 Hans Björklund 2015 John Elvesjö and Mårten Skogö 2016...
5 KB (118 words) - 21:12, 23 September 2024
Önnerud 2012: Filippa Knutsson 2013: Mona Henning 2014: Nina Stemme 2015: Petra Wadström 2016: Maria Strømme 2017: Nikoo Bazsefidpay 2018: Ulrika Hydman Vallien...
6 KB (686 words) - 22:15, 15 June 2024
youth prize: Karen Dolva, Norway 1st: Michela Magas, Croatia/ UK 2nd: Petra Wadström, Sweden 3rd: Claudia Gärtner, Germany youth prize: Kristina Tsvetanova...
3 KB (291 words) - 16:17, 12 October 2023