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Invention Grant
US2248045A Frequency modulation 失效

  • Patent Title: Frequency modulation
  • Application No.: US28240639
    Application Date: 1939-07-01
  • Publication No.: US2248045A
    Publication Date: 1941-07-08
  • Inventor: DOW ORVILLE E
  • Applicant: RCA CORP
  • Assignee: RCA Corp
  • Current Assignee: RCA Corp
  • Priority: US28240639 1939-07-01
  • Main IPC: H03C3/14
  • IPC: H03C3/14
Frequency modulation
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