Number | Date | Country | Kind |
---|---|---|---|
53/25295 | Mar 1978 | JPX | |
53/27385 | Mar 1978 | JPX | |
53/92236 | Jul 1978 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2953470 | Green et al. | Sep 1960 | |
3639245 | Nelson | Feb 1972 | |
3674736 | Lerman et al. | Jul 1972 | |
3910846 | Azar et al. | Oct 1975 | |
3938992 | Jadwin et al. | Feb 1976 | |
4122024 | Jones et al. | Oct 1978 |
Entry |
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Orr, Jr. et al., Fine Particle Measurement, McMillian, (1965), pp. 3-4. |