4. Telegraphy
  5. Systems
  6. Simplex-reversing periodic

James T. O'Farrell

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Dual beam sonar display system

Communications: electrical – Selective – Monitoring in addition to control
Patent

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Navigational display system

Boots – shoes – and leggings
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Viewing system

Telegraphy – Systems – Simplex-reversing periodic
Patent

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Profile ID: LFUS-PAI-P-1622881

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