Number | Date | Country | Kind |
---|---|---|---|
5-314394 | Nov 1993 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3371205 | Berry | Feb 1968 | |
4032782 | Smith et al. | Jun 1977 | |
4731533 | Vestal | Mar 1988 | |
4885470 | Abbott | Dec 1989 |
Number | Date | Country |
---|---|---|
2434090 | Feb 1976 | DEX |
0098448 | Jun 1984 | JPX |
2138201 | Oct 1984 | GBX |
Entry |
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Patent Abstracts of Japan, vol. 8, No. 213 (E-269), Sep. 28, 1984, Yasutaka Masatoshi, "Quadrupole Mass Spectrometer" (JP-A-59-098-448). |
Patent Abstracts of Japan, vol. 16, No. 112, (E-1180), Mar. 19, 1992, Norio Kameshima, "Quadruople Mass Spectrometric Device" (JP-A-03-285-246). |
Patent Abstracts of Japan, vol. 15, No. 3 (E-1019), Jan. 7, 1991, Hiroto Itoi, "Multipolar Electrode" (JP-A-02-257-558). |