共 50 条
- [23] PATENT INFORMATION IN THE UNITED-STATES NACHRICHTEN FUR DOKUMENTATION, 1986, 37 (4-5): : 209 - 213
- [24] UNITED-STATES PATENT REQUIREMENTS IN VITRO-JOURNAL OF THE TISSUE CULTURE ASSOCIATION, 1981, 17 (12): : 1084 - 1085
- [27] RE - THE UNITED-STATES PATENT OFFICE JOURNAL OF THE PATENT OFFICE SOCIETY, 1956, 38 (04): : 291 - 294