Number | Date | Country | Kind |
---|---|---|---|
2650298 | Nov 1976 | DE |
Number | Name | Date | Kind |
---|---|---|---|
3270237 | Danko | Aug 1966 | |
3496401 | Dumbaugh, Jr. | Feb 1970 | |
3644776 | DeCaro | Feb 1972 | |
3648094 | DeCaro et al. | Mar 1972 | |
3681640 | Martin | Aug 1972 | |
3712701 | Johnston et al. | Jan 1973 | |
3728572 | Maier et al. | Apr 1973 | |
3848152 | Schultz | Nov 1974 | |
4005324 | Dolenga et al. | Jan 1977 |
Entry |
---|
"Materials and Techniques for Electron Tubes", by W. H. Kohl, (1966), Table.4, p. 26. |