ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H03F0003180000 with semiconductor devices of complementary types (subsequent subgroups take precedence); 1
H03F0003181000 Low-frequency amplifiers, e.g. audio preamplifiers 1
H03F0003183000 with semiconductor devices only 1
H03F0003185000 with field-effect devices (H03F0003187000 takes precedence);; 1
H03F0003187000 in integrated circuits 1
H03F0003189000 High-frequency amplifiers, e.g. radio frequency amplifiers 1
H03F0003190000 with semiconductor devices only 1
H03F0003191000 Tuned amplifiers (H03F0003193000, H03F0003195000 take precedence);; 1
H03F0003193000 with field-effect devices (H03F0003195000 takes precedence);; 1
H03F0003195000 in integrated circuits 1
H03F0003200000 Power amplifiers, e.g. Class B amplifiers, Class C amplifiers (H03F0003260000-H03F0003300000; take precedence);; 1
H03F0003210000 with semiconductor devices only 1
H03F0003213000 in integrated circuits 1
H03F0003217000 Class D power amplifiers; Switching amplifiers 1
H03F0003220000 with tubes only (H03F0003240000 takes precedence);; 1