СПИСОК патентов США - подгруппа МПК16 H04M15/22
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| № п/п | Номер патента | Название патента | |||
2015 | |||||
| 1 | 9215077 | Method and system for supporting multiple time zones and charging method and system in IMS | |||
2002 | |||||
| 2 | 6408174 | Communication method, system, and device for reducing processor load at tariff switch | |||
1991 | |||||
| 3 | 5027387 | Reverse direction calling system | |||
1982 | |||||
| 4 | 4356352 | Circuit arrangement for telephone exchange systems having time staggered charge metering pulse frequencies | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||