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| Name | Last modified | Size | Description |
|---|---|---|---|---|
| Parent Directory | - | ||
| Ceramic electron vacuum tube - US2647218.pdf | 2015-11-07 09:06 | 468K | |
| Ceramic electron vacuum tube - US2719185.pdf | 2015-11-07 09:10 | 555K | |
| Ceramic electron vacuum tube - US2754445.pdf | 2015-11-07 09:31 | 530K | |
| Ceramic electron vacuum tube - US2812466.pdf | 2015-11-07 09:28 | 331K | |
| Method for making electrode in Vacuum tube - US7812540.pdf | 2015-11-07 09:37 | 1.2M | |
| Vacuum tube - US2629066.pdf | 2015-11-07 09:33 | 609K | |