Number | Date | Country | Kind |
---|---|---|---|
82301684.5 | Mar 1982 | EPX |
Number | Name | Date | Kind |
---|---|---|---|
3325675 | Sanford | Jun 1977 | |
3743984 | Takenaka et al. | Jul 1973 | |
3858134 | Budd | Dec 1974 | |
4034324 | Sano et al. | Jul 1977 |
Number | Date | Country |
---|---|---|
2949851 | Jun 1981 | DEX |
1330827 | GBX |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 24, No. 2, Jul. 1981, pp. 1061-1062. |
Soviet Inventions Illustrated, vol. R45, 30th Apr. 1980, No. C7202C/12, London. |