A chipless RFID tag can convey a serial number, though it does not usually use conductive inks or polymers. Instead, such tags use RF-resonant materials in the inks. So, for instance, if you have 20 ...
Yes, it is possible. I’m not sure I can explain in much detail how this would be done, but essentially, an RFID reader would capture the unique serial number of a tagged item—say, an expensive piece ...