Number | Name | Date | Kind |
---|---|---|---|
3865118 | Bures | Feb 1975 | |
3866615 | Hewson | Feb 1975 | |
3949757 | Sabel | Apr 1976 | |
4011875 | Lehr et al. | Mar 1977 |
Number | Date | Country |
---|---|---|
2,310,775 | Dec 1976 | FR |
2,124,684 | Nov 1972 | DE |
246,004 | Jun 1969 | SU |
Entry |
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Porstmann et al., "P Wave Sychronus . . . Thoracotomy", The Am. J. Cardiology, v. 30, Jul. 1972, pp. 74-76. |