| 2144029 | High frequency coupling device | |||
| 2180413 | Magnetically tuned high frequency circuits | |||
| 1884591 | Electric discharge tube | |||
| 2028596 | Oscillation circuit | |||
| 2114846 | Frequency stabilizing device | |||
| 2151752 | Compensator | |||
| 2281461 | Temperature compensating means | |||
| 1589308 | Radiofrequency apparatus | |||
| 2134794 | Temperature-independent oscillatory circuits | |||
| 2113603 | High-frequency inductance device | |||
| 2332518 | Thermostat | |||
| 0995854 | ||||
| 1970969 | Temperature responsive mechanism | |||
| 1845998 | Thermostat |
| GB335164A | ||||
| GB400025A |