The material being flexible or adapted for folding

Official title: {the material being flexible or adapted for folding, e.g. paper or paper-like materials used in luggage labels, identification tags, forms or identification documents carrying RFIDs (methods for testing the genuineness of valuable papers, e.g. banknotes or passports G07D7/00; constructional features of booklets and the like B42D)}

G06K19/025 (The material being flexible or adapted for folding) appears on 232 US grants and 299 published applications in this corpus.