Nome: | Van Valkenburg, L. D.; Holyoke, Massachusetts (USA) |
Abbreviazione: | van-valken |
Prodotti: | Modelli |
Riassunto: |
In the November 1925 edition of The Radio Trade Directory on page 120, under the listing for manufacturers of crystal sets, the L.D. Van Valkenburg Company was located in Holyoke, Massachusetts . |
Storia: |
Fixed Detectors.
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Conformità dei dati | Ulteriori informazioni |