Inventor · disambiguated record
Werner Frerichs
Also filed as: FRERICHS WERNER
2 granted patents·15 citations·filing 1986–1986
57Inventor score
Technology areasH04M
Files withPHILIPS CORP2
Top patents by PatentIndex Score
2 records- 0141US4769835AMethod of and circuit arrangement for inserting dialling intervals between stored dialling digitsPHILIPS CORP·Filed 1986·Granted Sep 6, 1988·9 cites·7 claims
- 0235US4723275ACircuit arrangement for generating an acoustic ringing signal in a subscriber telephone setPHILIPS CORP·Filed 1986·Granted Feb 2, 1988·6 cites·4 claims
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