Invention Grant
US07267880B2 Presence indicator for removable transparent film 有权
可拆卸透明胶片的存在指示

Presence indicator for removable transparent film
Abstract:
A substrate having a surface carrying a removable transparent film that can be removed by the surface by a desired washing process, and removable presence indicator associated with the removable transparent film, the presence indicator being removable by the same desired washing process as the removable transparent film. A method of producing a substrate having a presence indicator in contact with a removable transparent film a method of washing a substrate having a presence indicator in contact with a removable transparent film are also disclosed.
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