Inventor

GUSTAFSON KARL FREDRIK ROBERT

SE2 patents

Patents

2 patents

US5797095AAug 18, 1998

Supervisory audio tone-signalling tone(SAT-ST) handling

ERICSSON TELEFON AB L M2 citations56

US5878342AMar 2, 1999

Supervisory audio tone (SAT) approximation in an analog cellular mobile radio telephone system

ERICSSON TELEFON AB L M3 citations54