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4194471 | Baresel | Mar 1980 | |
4789939 | Hamburg | Dec 1988 | |
4878473 | Nakaniwa et al. | Nov 1989 | |
4915080 | Nakaniwa et al. | Apr 1990 | |
4988428 | Iwakiri et al. | Jan 1991 | |
5259189 | Baier | Nov 1993 |
Number | Date | Country |
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125941 | May 1990 | JPX |
Entry |
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Article entitled "NO.sub.2 Gas-Concentration Measurement with a Saw-Chemosensor", IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. UFFC-34, No. 2, Mar. 1987, pp. 148-155; by Adrian Venema et al. |