Based on Title 35, U.S.C., 1946 ed., § 70, part (R.S. 4921, amended (1) Mar. 3, 1897, ch. 391, § 6, 29 Stat. 694, (2) Feb. 18, 1922, ch. 58, § 8, 42 Stat. 392, (3) Aug. 1, 1946, ch. 726, § 1, 60 Stat. 778).

This section is the same as the provision which opens R.S. 4921 with minor changes in language.