ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H04B0003600000 Systems for communication between relatively movable stations, e.g. for communication with lift (H04B0003540000 takes precedence);; 1
H04B0005000000 Near-field transmission systems, e.g. inductive loop type 1
H04B0005020000 using transceiver 1
H04B0005040000 Calling systems, e.g. paging system 1
H04B0005060000 using a portable transmitter associated with a microphone 1
H04B0007000000 Radio transmission systems, i.e. using radiation field (H04B0010000000, H04B0015000000 take precedence);; 1
H04B0007005000 Control of transmission; Equalising 1
H04B0007010000 Reducing phase shift 1
H04B0007015000 Reducing echo effects 1
H04B0007020000 Diversity systems 1
H04B0007040000 using a plurality of spaced independent aerials 1
H04B0007060000 at transmitting station 1
H04B0007080000 at receiving station 1
H04B0007100000 using a single aerial system characterised by its polarisation or directive properties, e.g. polarisation diversity, direction diversity 1
H04B0007120000 Frequency-diversity systems 1