pto
abbr. Porto (Italian, Portuguese, Spanish=port) (Italian, Portuguese...
[Example]And in april, pto guangzhou and the state intellectual property office jointly organized a program on patent filing and enforcement in shenzhen.
In April this year, the U.S. Patent and Trademark Office Guangzhou Office and the State Intellectual Property Office of China jointly organized a program on patent filing and enforcement in shenzhen. Patent application and enforcement projects