classification of patents造句

例句与造句

1. The meetings of the Committee nevertheless led to two Conventions, one on the international classification of patent ( 1954 ).
2. The Convention, along with the European Convention on the International Classification of Patents for Invention of 1954, resulted from the work of the Council of Europe's Committee of Experts in patent matters in the early 1950s.
3. It's difficult to find classification of patents in a sentence. 用classification of patents造句挺难的