ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H03G0003180000 having semiconductor devices 1
H03G0003200000 Automatic control (combined with volume compression or expansion H03G0007000000) 1
H03G0003220000 in amplifiers having discharge tubes 1
H03G0003240000 Control dependent upon ambient noise level or sound level 1
H03G0003260000 Muting amplifier when no signal is present 1
H03G0003280000 in frequency-modulation receivers 1
H03G0003300000 in amplifiers having semiconductor devices 1
H03G0003320000 the control being dependent upon ambient noise level or sound level 1
H03G0003340000 Muting amplifier when no signal is present 1
H03G0005000000 Tone control or bandwidth control in amplifiers 1
H03G0005020000 Manually-operated control (variable bandpass or bandstop filters H03H0007120000) 1
H03G0005040000 in untuned amplifiers 1
H03G0005060000 having discharge tubes 1
H03G0005080000 incorporating negative feedback 1
H03G0005100000 having semiconductor devices 1