4. Measuring, testing, or signalling instruments
  5. Security or signal instrument or casing
  6. Lost child or person locator

Barry M. Marks

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Electronic marker device and method of making same

Communications: radio wave antennas – Antennas – Buried underground or submerged under water
Patent

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Electronic marker for buried utilities

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Lost child or person locator
Patent

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Profile ID: LFUS-PAI-P-354388

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