Inventor · disambiguated record

Ulrich Appel

Also filed as: APPEL ULRICH

2 granted patents·21 citations·filing 1975–1975

59Inventor score

Technology areasH04B H04J

Files withIBM2

Top patents by PatentIndex Score

2 records

0151US4005276ADigital voice signaling with digital echo detection and voice activity compression used to cancel echoIBM·Filed 1975·Granted Jan 25, 1977·14 cites·12 claims
0239US3975686ALoss signal generation for delta-modulated signalsIBM·Filed 1975·Granted Aug 17, 1976·7 cites·13 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →