Number | Name | Date | Kind |
---|---|---|---|
3211907 | Blaisdell et al. | Oct 1965 | |
3740548 | Hoyler | Jun 1973 | |
3836768 | Clarke et al. | Sep 1974 | |
3974481 | Lediev et al. | Aug 1976 | |
3976272 | Murray et al. | Aug 1976 |
Entry |
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Railway System Controls; "CP Has Process Control At Alyth"; Mar., 1972, pp. 11, 13-16. |