| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 419 | | ARRANGEMENTS FOR DIRECT CONVERSION OF RADIATION ENERGY FROM RADIOACTIVE SOURCES TO FORMS OF ENERGY OTHER THAN ELECTRIC ENERGY (e.g., light) [G21H-3/00] {1} |
| DIG 420 | DD | .~> In which material is excited to luminesce by the radiation [G21H-3/02] |