character: Reginald Fessenden
topic: Advancements in amplitude modulation
grade: 12
subject: History
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character: Guglielmo Marconi
topic: Radio Frequency and Early Wireless Communication
grade: 12
subject: History
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character: Nikola Tesla
topic: Innovations in Alternating Current and Wireless Transmission
grade: 12
subject: History
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character: Edward Howard Armstrong
topic: Invention of Frequency Modulation and its Impact on Radio Technology
grade: 12
subject: History
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