Number | Date | Country | Kind |
---|---|---|---|
2733615 | Jul 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3631309 | Meyers | Dec 1971 | |
3631311 | Engbert | Dec 1971 | |
3693057 | Wiedmann | Sep 1972 | |
3909837 | Kronlage | Sep 1975 | |
3940785 | Genesi | Feb 1976 | |
3971060 | Leuschner | Jul 1976 | |
4005469 | Chang et al. | Jan 1977 |
Entry |
---|
Wu, IBM Technical Disclosure Bulletin, vol. 11, No. 11, Apr. 1969, p. 1439. |