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5629656 | Tada et al. | May 1997 | A |
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5867076 | Tade et al. | Feb 1999 | A |
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6362705 | Kuroda et al. | Mar 2002 | B1 |
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0487396 | May 1992 | EP |
56116302 | Sep 1981 | JP |
11340706 | Dec 1999 | JP |
Entry |
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Wong, “Microstrip Tapped-Line Filter Design”, IEEE Trans. on Microwave Theory & Tech., vol. MTT-27, No. 1, Jan. 1979, pp. 45-50. |