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4228592 | Aug 1992 | DEX |
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2918501 | Brehm et al. | Dec 1959 | |
3917724 | Martini | Apr 1975 | |
4042638 | Ozawa et al. | Aug 1977 |
Number | Date | Country |
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3081233 | Apr 1991 | JPX |
910371 | Nov 1962 | GBX |
Entry |
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