ดาวน์โหลด

ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ

รหัส / code คำอธิบาย / code name Version
H04M0001530000 Generation of additional signals, e.g. additional pulses 1
H04M0001540000 Arrangements wherein a dial or the like generates identifying signals, e.g. in party-line systems 1
H04M0001560000 Arrangements for indicating or recording the called number at the calling subscriber's set 1
H04M0001570000 Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set (at the operator set in a manual exchange H04M0005200000) 1
H04M0001580000 Anti-side-tone circuits 1
H04M0001600000 including speech amplifiers 1
H04M0001620000 Constructional arrangements 1
H04M0001640000 Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations (centralised dictation systems H04M0011100000) 1
H04M0001650000 Recording arrangements 1
H04M0001652000 Means for playing back the recorded messages by remote control over a telephone line (H04M0001658000 takes precedence);; 1
H04M0001654000 Telephone line monitoring circuits therefor, e.g. ring detectors 1
H04M0001656000 for recording conversations 1
H04M0001658000 Means for redirecting recorded messages to other extensions or equipment 1
H04M0001660000 with means for preventing unauthorised or fraudulent calling (verifying user identity or authority in secret or secure digital communications H04L0009320000) 1
H04M0001663000 Preventing unauthorised calls to a telephone set 1
จำนวนรหัสข้อมูล 15 จาก 73902