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3661674 | Higgs et al. | May 1972 | A |
4632847 | Lomasney et al. | Dec 1986 | A |
5190818 | Sakai | Mar 1993 | A |
5908893 | Kawasaki et al. | Jun 1999 | A |
5962147 | Shalub et al. | Oct 1999 | A |
Number | Date | Country |
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925468 | Jan 1997 | JP |
A10259360 | Sep 1998 | JP |
Entry |
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A.D. Roberts; Natural Rubber Science and Technology; pp. 94 & 95 (1988). |