Number | Name | Date | Kind |
---|---|---|---|
2939952 | Paul et al. | Jun 1960 | |
3328146 | Hanlein | Jun 1967 | |
4885500 | Hansen et al. | Dec 1989 | |
5283436 | Wang | Feb 1994 | |
5298745 | Kernan et al. | Mar 1994 | |
5468958 | Franzen et al. | Nov 1995 | |
5525084 | Broadbent et al. | Jun 1996 |
Number | Date | Country |
---|---|---|
2737903 | Mar 1979 | DEX |
0091651 | May 1984 | JPX |
Entry |
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Kohl, "Materials and Techniques for Electron Tubes," General Telephone & Electronics, Technical Series 1960 TK 6565.V3,K65 C4, pp.20-25 and 66-69. |