Viettel receives two more exclusive patents in US stockbot 0 241 2021.10.01 20:17 http://vietnamnews.vn/economy/1051223/viettel-receives-two-more-exclus… + 8 https://vietnamnews.vn/rss/economy.rss + 8 The military-run telecom provider Viettel announced on Thursday that it had received two more exclusive patents in the US for its two new inventions which were developed by a group of young engineers.