国家/地区 世界知识产权组织（2）
IPC部 B（2）
IPC大类 B05（2）
IPC小类 B05D（2）
IPC B05D005/12（2）
发明人 SCHEFFER D（2）
公开年 2012（2）
申请年 2011（2） 
专利权人 SCHEFFER D（2）

Multilayered security device useful for preventing tampering comprises a first layer comprising a patterned substrate and a second layer overlying the pattern where the second layer comprises a coating composition comprising graphene sheets.

LETTOW J, SCHEFFER D, LETTOW J S

Making conductive image useful in e.g. security device, involves forming image on substrate, overcoating the image with coating containing graphene sheets, and removing a portion of the coating from the substrate.

REDMOND K, SCHEFFER D