The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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| Number | Title | Issue Date |
| 4001727 | Power control circuit for a power oscillator Control of the gate electrode of a magnetic-beam-triode oscillator is effected by a diode connected between the gate and a controllable shunt regulator. The regulator is varied by a voltage derived from a differential amplifier forming part of a closed lo... | 01/04/1977 |