Google Inc. ($GOOG) said Friday that it has purchased technology patents from IBM Corp. ($IBM) as the Web-search giant stocks up on intellectual property to defend itself against lawsuits.

The patents involve the "fabrication and architecture of memory and microprocessing chips," computer architecture including servers and routers and online search engines, among other things. SEO stands for search engine optimization, or the practice of structuring websites and content so they rank well on search engines like Google. -WSJ