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- Schoppe Kaspar, 665 results
- Ufficio Marconi, Roma, 385 results
- Mander von Neuhausen Peter, 301 results
- Grembs Georg, 190 results
- Giovagnoli Enrica, 180 results
- Marconi's Wireless Telegraph Co. Ltd., Londra, 180 results
- Welser Markus, 164 results
- Cesi Federico, 127 results
- Electrical and Musical Industries Ltd. - E.M.I., Hayes (Middlesex), 113 results
- Marconi Offices, Londra, 84 results