Generally basic stitch patterns are not copyrightable, but the way
those patterns are written and presented are, along with the photos for them. For instance, the Knitting Fool
website has st patterns from the Barbara Walker books. However, her format is very different, kind of like a table, rather than the usual format for writing patterns. And she has her own color pictures of the sts; Barbara Walker's are in B&W.
The same holds true for project patterns; there's only so many ways you can present a topdown raglan, or garter st scarf, or triangular shawl. It's how you write the pattern that makes it unique.