Inventor's Day in Thailand
Inventor's Day in Thailand is held on February 2. This event in the first decade of the month February is annual. 
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Commemorates the patent registration of King Bhumibol's Chai Phatthana paddle wheel aerator in 1993. Adopted 10 May 1994.
Inventors' Day in Germany, Austria and Switzerland on November 9
International Inventor's Day on November 9
Inventors' Day in United States on February 11
National Inventors' Day in Mexico on February 17
Invention Day in Japan on April 18
Bolivian Inventor's Day on April 23
World Technology Day for the Future on May 13