4. Illumination
  5. Chemiluminescent lighting

William R. Heffernan

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Device for warning of impending roof-fall in underground excavat

Signals and indicators – Indicators – Visual light signal
Patent

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Emergency lighting device

Illumination – Chemiluminescent lighting
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Multi-purpose lantern

Illumination – Chemiluminescent lighting
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Personnel marker device

Illumination – Chemiluminescent lighting
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Profile ID: LFUS-PAI-P-1072384

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