共 50 条
- [1] Biotechnology patents in the United States BIOTECHNOLOGY, PATENTS AND MORALITY, 1997, : 171 - 172
- [2] THE UNITED STATES PATENTS QUARTERLY JOURNAL OF THE PATENT OFFICE SOCIETY, 1939, 21 (02): : 153 - 154
- [6] CLASSIFICATION OF UNITED STATES PATENTS ON ELECTROTYPING JOURNAL OF THE PATENT OFFICE SOCIETY, 1934, 16 (10): : 822 - 822