4. H - Electricity
  5. 04
  6. J

Ralph W. Bumstead

H - Electricity – 04 – J

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Cathode ray tube and harmonic generator

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Patent

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Telegraphy

H - Electricity – 04 – J
Patent

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Multiplex television system

H - Electricity – 04 – N
Patent

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Tape recorder monitoring system and start-stop device therefor

G - Physics – 11 – B
Patent

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Profile ID: LFCA-PAI-P-233796

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