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 Blocking World Wide Web standards
The w3c is the consortium which develops standards for the World Wide Web. Apple have been accused of making abusive use of the w3c patent procedures in their assertions in 2009, 2010 and in 2011.
(Note: be careful to add only disputes about software patents, not hardware patents.)
Court cases and lawsuits involving Apple...
 By Apple
- Apple v. HTC (2010, USA)
- Apple v. Samsung 2011 lawsuits worldwide overview
- Indirectly by selling patents to patent troll Digitude Innovations.
 Against Apple
- Elan Microelectronics v. Apple (2010, USA)
- Nokia v. Apple (2010, USA)
- Mirror Worlds v. Apple (2008, USA)
- Acacia Research Corp. v. Apple (2007, USA)
- Motorola v. Apple (2010, USA)
- Graphics Properties Holdings, Inc. v. Apple (2010, USA)
- Samsung v. Apple (2011, Germany) (Apple filed a countersuit, but this was rejected)
 Speculation about LLVM
There are no known granted patents, owned by Apple, which would be needed for someone to make a clone of the LLVM compiler.
Apple is a major contributor to LLVM. LLVM is free software, distributed under an X11-style permissive licence. This is a common type of licence, containing no explicit patent protection for recipients of the software.
(Can you help? LLVM's contributor policy asks contributors to give free access to necessary patents. Has Apple done this? Reminder: If Apple is found to have been granted patents on LLVM ideas, we should check if those ideas are implemented in LLVM's repository (covered by LLVM's patent policy) or if they're for non-contributed extensions.)
1. A method for processing computer code, comprising: storing a device-independent intermediate representation of a source code; and in the event an indication is received that the source code has changed, using the changed source code to generate and store a new intermediate representation of the changed source code.
8. A method as recited in claim 1, wherein the intermediate representation comprises LLVM intermediate representation (IR), LLVM byte code or other byte code, or another appropriate intermediate representation.
"LLVM IR" is also mentioned in the application's "Detailed description" but only as an example. The specific mention, at  in the application, reads:
 Prior art babble
There are no accusations or threats of litigation, so no one is in need of prior art. Still, some people have discussed it for hypothetical situations. Suggestions can be briefly noted here.
But keep in mind that prior art has to predate a specific patent, and has to accurately describe the specific idea allegedly infringed by the attacked software. Since there's no litigation, and thus no specific patent or specific piece of software, this discussion is just a collection of very general starting points.
 Patents where "LLVM" refers to something else
Some of Apple's patents use the abbreviation "LLVM" to refer to other things, such as "low-level virtual memory", as used in US 6263421, titled Virtual memory system that is portable between different CPU types.
Confusing this LLVM with the compiler named LLVM would be a silly mistake which should be avoided.
 Related pages on en.swpat.org
- Apple Dock
- HTML5 and video patents
- Software progress happens without patents#Is_Apple_an_example?
- Nortel and Rockstar Bidco
 News selection
- Apple Made A Deal With The Devil (No, Worse: A Patent Troll), 9 Dec 2011, Techcrunch
- Apple using patents to undermine open standards again, 9 Dec 2011, Haavard Opera blog
- Apple granted patent on webpage scrolling behaviors, media granted patent on crazy, 22 June 2011, thisismynext.com
- Apple Sued Over Touchpad Technology at ITC, 26 Apr 2010, LegalTimes blog (see also US ITC)
- Good Artists Copy, Great Artists Steal, 9 Mar 2010, by Johnathan Schwartz of Sun Microsystems about patent threats from Apple and Microsoft
- Apple files litigation against HTC for violation of 20 patents, 2 Mar 2010, TechCrunch
- Apple Seeks Patent On Operating System Advertising, 23 Oct 2009, Slashdot
- Apple patent claim threatens to block or delay W3C specification, 7 Apr 2009, Haavard Opera blog
- Apple claims to own patents on the HTML5 canvas tag, Mar 2007 - but they later solved this problem by agreeing to license those patent(s) under the w3c's royalty-free terms.
- Apple's 200 patents on the iPhone, 16 Jan 2007, unwiredview - some are hardware patents, some are software patents
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