Computer for recording time and charges for telephone calls

Details Computer for recording time and charges for telephone calls Computer for recording time and charges for telephone calls

1985-07-22

1987-06-23

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 52

Patent

active

D02904608

REFERENCES:
patent: 3146577 (1964-09-01), Danner
patent: 3320366 (1967-05-01), Plummer
patent: 3524948 (1970-08-01), Lewin
patent: 3538258 (1970-11-01), Zuckerman
patent: 3767862 (1973-10-01), Grushow
patent: 4161626 (1979-07-01), Waldo
patent: 4260855 (1981-04-01), Ruberstein
Radio Electronics, 6/1978; Build-"Digi-Toll"; Digital Time-Keeping Instrument; pp. 69-72.

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