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| GW Electronics Incorporated; Norcross |
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| Hajós és Szántó Elektromosgyár RT, HAESZ |
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| Hegra |
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| Hiradástechnika Szövetkezet (HTSZ); Budapest |
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| | His Master's Voice | | GRAMOFON | | 193? - | | | | |
| | His Master's Voice | Gramofon | His Master's Voice gramofon | | 193? - | | | | |
| | His Master's Voice | Lemezjátszó | His Master's Voice Lemezjátszó | | 193? - | | | | |
| | His Master's Voice | | Tölcséres gramophone | | ~1930 - | | | | |
| Híradótech. Váll. |
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| Hornyphon |
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| Huffy Company; Dayton, Ohio |
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| Ingelen |
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| Ipari Műszergyár Budapest |
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| Iskolai Taneszközök Gyára (ITG); Budapest |
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| Jeszenszky Antal, Gyula |
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| Katonai Rádió/Military |
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| Katonai Rádiógyár, Voronyezs, |
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| Klangfilm GmbH. |
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| Koss Corporation, Milwaukee |
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| L.Idéal Lassueur; Ste. Croix |
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| Lengyel István gépészmérnök |
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| Loewe Opta GmbH |
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