Number | Date | Country | Kind |
---|---|---|---|
1-60091 | Mar 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4338492 | Snopko | Jul 1982 | |
4356509 | Skerlos et al. | Oct 1982 | |
4414432 | Skerlos et al. | Nov 1983 | |
4456925 | Skerlos et al. | Jun 1984 | |
4629829 | Puhl et al. | Dec 1986 |
Number | Date | Country |
---|---|---|
0146647 | Jun 1988 | JPX |
Entry |
---|
The Bell System Technical Journal, Mar. 1967, vol. XLVI, No. 3, pp. 497-511. |