4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

Charles B. Stieff

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Electronic fiber optic seal monitors

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Self-monitoring seal

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Profile ID: LFUS-PAI-P-309828

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