Virgilio Sangutan, president of Davao Inventors Association announces that they are calling for entries for the Regional Invention Contests and Exhibits at a big mall in Matina on October 1-3. (Ace R.Morandante/davaotoday.com)
Virgilio Sangutan, president of Davao Inventors Association announces that they are calling for entries for the Regional Invention Contests and Exhibits at a big mall in Matina on October 1-3. (Ace R.Morandante/davaotoday.com)
