ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
H04K0003000000 Jamming of communication; Counter-measures 1
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) 1
H04L0001000000 Arrangements for detecting or preventing errors in the information received 1
H04L0001020000 by diversity reception 1
H04L0001040000 using frequency diversity 1
H04L0001060000 using space diversity 1
H04L0001080000 by repeating transmission, e.g. Verdan system 1
H04L0001120000 by using return channel 1
H04L0001140000 in which the signals are sent back to the transmitter to be checked 1
H04L0001160000 in which the return channel carries supervisory signals, e.g. repetition request signals 1
H04L0001180000 Automatic repetition systems, e.g. van Duuren system 1
H04L0001200000 using signal-quality detector 1
H04L0001220000 using redundant apparatus to increase reliability 1
H04L0001240000 Testing correct operation 1
H04L0005000000 Arrangements affording multiple use of the transmission path 1