Number | Date | Country | Kind |
---|---|---|---|
02571/88 | Jul 1988 | CHX |
Number | Name | Date | Kind |
---|---|---|---|
3946298 | Van de Loo | Mar 1976 | |
4249369 | Tsuzuki et al. | Feb 1981 | |
4520909 | Brewer | Jun 1985 | |
4774805 | Wood et al. | Oct 1988 |
Number | Date | Country |
---|---|---|
2104116 | Mar 1983 | GBX |
Entry |
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Macaulay, David, "The Way Things Work", 1988, pp. 88-89. |