Number | Name | Date | Kind |
---|---|---|---|
3912193 | Calvaer | Oct 1975 | |
4077579 | Seleski et al. | Mar 1978 | |
4157477 | Kall et al. | Jun 1979 | |
4184080 | Massey | Jan 1980 |
Entry |
---|
Shintani, "IEEE Transactions on Industrial Electronics and Control Instrumentation", May 1979, pp. 70-74. |