Opera developer Haavard Moen has accused Apple of repeatedly using patents to undermine the development of web standards and block their finalization.

World Wide Web Consortium (W3C), the industry group that governs and oversees the development of web standards, requires that every specification it approves be implementable on a royalty-free basis, barring extraordinary circumstances that justify an exception to this rule. The specifications can contain patented technology, as long as royalty-free patent licenses are available.

Members of W3C—a group that includes representatives from Apple, M...