4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Telephone equipment

Test-Um, Inc.

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Electrical connector for straight-through connection and breakou

Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – Within distinct housing spaced from panel circuit arrangement
Patent

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Electronic apparatus and method for measuring length of a...

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate

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Listening device for tracing line continuity and detecting telep

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Using portable test set
Patent

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Telephone line test kit

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Telephone lineman's "butt in" test set

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent

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