(There is a "Digital Negative (DNG) Specification Patent License", but it does not actually state that there are any patents held on DNG, and the September 2009 statement was made at least 4 years after this license was published).
（有一个“数字负片（DNG）规范专利许可证”，但不实际拥有， 有 DNG格式上举行的任何专利，2009年9月说，至少4年后才能得到这个出版许可证）。