Microwave ovens
United States Patent 2920174

Inventors:
Haagensen, Duane B.
Publication Date:
01/05/1960
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Assignee:
RAYTHEON CO
Primary Class:
219/685
Other Classes:
174/381, 219/751, 219/740, 174/394, 333/252
International Classes:
H05B6/74; H05B6/76; H05B6/80
US Patent References:
2761942Heating apparatus
Foreign References:
GB643605A