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4803888 | Choquet | Feb 1989 | A |
5195393 | Wolfington et al. | Mar 1993 | A |
5566786 | De Angelis et al. | Oct 1996 | A |
5834942 | De Angelis | Nov 1998 | A |
6073728 | Olson et al. | Jun 2000 | A |
6123176 | O'Donnell et al. | Sep 2000 | A |
6289742 | De Angelis | Sep 2001 | B1 |
Number | Date | Country |
---|---|---|
0 731 209 | Sep 1996 | EP |
1 029 973 | Aug 2000 | EP |
04361981 | Dec 1992 | JP |
WO 0037738 | Jun 2000 | WO |
Entry |
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Wehking, K.H., “Magnetic inductive testing of elevator ropes”, Nov.-Dec., 1998, pp. 16-22, Lift Report. |