Sealing a Sustainable Future with the Pili Seal Patent - IPOPHIL
TAGUIG - Whenever heavy storms rained on the bungalow of Aeronautical Engineer Mark Kennedy Bantugon’s family in Mabini, Batangas, he and his siblings knew it was time to chew a gum. Using the chewed gum to seal off roof leaks was a creative and frugal fix …