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All Patents in class 181/148 | |||||
Number | Date | Patentee | Title | Type | |
2,113,623 | Apr. 12, 1938 | V.C. Macnabb | Sound Reproducing Apparatus | radios | |
2,171,940 | Sep. 05, 1939 | V.C. Macnabb | Sound Reproducing Apparatus | radios |