Number | Date | Country | Kind |
---|---|---|---|
3116402 | Apr 1981 | DEX | |
3148503 | Dec 1981 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2844680 | Christy et al. | Jul 1958 | |
3860894 | Popovic et al. | Jan 1975 | |
4004505 | Magnenet | Jan 1977 | |
4329921 | Treider et al. | May 1982 |
Number | Date | Country |
---|---|---|
1454857 | Nov 1976 | GBX |
2004504 | Apr 1979 | GBX |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 15, No. 8, Jan. 1973, p. 2356; vol. 19, No. 6, Nov. 1976, p. 2036; vol. 21, No. 6, Nov. 1978, pp. 2283-2284. |