4. Telephonic communications
  5. Call or terminal access alarm or control
  6. At substation

Richard L. Maybach

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Call screening in a public telephone station

Telephonic communications – Call or terminal access alarm or control – At substation
Patent

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Fraud prevention in a public telephone station

Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
Patent

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Method and apparatus for detecting localized polarization...

Optical communications – Diagnostic testing
Reexamination Certificate

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Side-tone OTDR for in-service optical cable monitoring

Optics: measuring and testing – For optical fiber or waveguide inspection
Patent

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Profile ID: LFUS-PAI-P-1064093

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