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The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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| Number | Title | Issue Date |
| 6951105 | Electro-water reactor steam powered electric generator system An electro-water reactor steam powered electric generator system includes a steam boiler having water and steam chambers, a water intake pipe and a plurality of steam delivery pipes. An electric resistance heater is mounted under and around the boiler having power l... | 10/04/2005 |
| 4334129 | Telephone digital office cutover system A system for automated pre-testing of subscriber pairs prior to final transfer from an old telephone office to a new digital central office. The system combines a known line verification tester, a trunk transition system, and an optional line ringing test... | 06/08/1982 |
