ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H03G0005120000 incorporating negative feedback 1
H03G0005140000 in frequency-selective amplifiers 1
H03G0005160000 Automatic control 1
H03G0005180000 in untuned amplifiers 1
H03G0005200000 having discharge tubes 1
H03G0005220000 having semiconductor devices 1
H03G0005240000 in frequency-selective amplifiers 1
H03G0005260000 having discharge tubes 1
H03G0005280000 having semiconductor devices 1
H03G0007000000 Volume compression or expansion in amplifiers 1
H03G0007020000 having discharge tubes 1
H03G0007040000 incorporating negative feedback 1
H03G0007060000 having semiconductor devices 1
H03G0007080000 incorporating negative feedback 1
H03G0009000000 Combinations of two or more types of control, e.g. gain control and tone control 1