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- [36] Patent term extension in the US ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2018, 256
- [38] REPORT ON US PATENT SYSTEM JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH, 1967, 26 (07): : 266 - &
- [39] The needs of the US patent office JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY-US, 1919, 11 (05): : 237 - 239