The authors wish to acknowledge the contributions of the Portable Network Graphics mailing list, the readers of comp.graphics, and the members of the World Wide Web Consortium (W3C).
The Adam7 interlacing scheme is not patented and it is not the intention of the originator of that scheme to patent it. The scheme may be freely used by all PNG implementations. The name "Adam7" may be freely used to describe interlace method 1 of the PNG specification.
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End of PNG Specification