The Wayback Machine - https://web.archive.org/web/20150905090301/http://patents.justia.com/patents-by-us-classification/24

Buckles, Buttons, Clasps, Etc. Patents (Class 24)


Cross-Reference Art Collections

Shirt collar holders (Class 24/900.1)

Foreign Patent Art Collections

Class-related foreign documents (Class 24/FOR000)