4. Telephonic communications
  5. Telephone line or system combined with diverse electrical...
  6. Having transmission of a digital message signal over a...

Charles W. Berthoud

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Battery capacity calculator and method of calculating...

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – Regulated discharging
Reexamination Certificate

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DTMF download technique for digital telephone devices

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
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Method and apparatus for disabling an integrated circuit...

Communications: electrical – Condition responsive indicating system – Specific condition
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Methods and devices for forwarding identification data

Telephonic communications – Special services – Automatic directory service
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Performance indication system for use with a universal...

Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis
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Profile ID: LFUS-PAI-P-2062722

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