Number | Date | Country | Kind |
---|---|---|---|
2732160 | Jul 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3599628 | Abbenante | Aug 1971 | |
3641993 | Gaardner et al. | Feb 1972 | |
3703168 | Frink | Nov 1972 | |
3774593 | Hakata et al. | Nov 1973 | |
3811428 | Van Horn et al. | May 1974 | |
3878833 | Arneson et al. | Apr 1975 | |
4149716 | Scudder | Apr 1979 |
Number | Date | Country |
---|---|---|
2134286 | Jul 1970 | DEX |
Entry |
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DeLuca, C. J. et al., "A Polar Technique for Displaying". |
Sureau, "E'tude de l'Activite E'lectrique de l'Uterus au Cours du Travail", Gynecologie et Obstetrique, vol. 55, No. 2, 1956, pp. 153-175. |
Fischer, W. M., "Kardioto Kographie", Georg. Thieme Verlag, Stuttgart, Germany (1973). |