4. Measuring, testing, or signalling instruments
  5. Measuring, regulating or indicating instrument, or casing
  6. Electrical property

David M. Rollins

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Electronic test set for telecommunications, alarm system, and ci

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent

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Elongate electrical connector retaining device

Geometrical instruments
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Portable telecommunications test instrument with a talk battery

Telephonic communications – Substation or terminal circuitry – Conversion of signal form
Patent

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Portable telecommunications test instrument with line condition

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

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Profile ID: LFUS-PAI-P-208091

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