When the question contains a link, such as

[Patent Application #20120225162](http://www.google.com/patents/us20120225162) 

the system should tag it with . This tag should be special, like a moderator tag on meta.

Edit: I don't think these tags should count towards the tag count, otherwise you run out of space very easily.

See Also

Syntax for patent number

1 Answer 1


The automatic tagging might be fine as a suggestion but doesn't handle all cases. A question like “Is Patent A prior art for patent B” would be tagged but not .

Why would the tag be special? Do you mean a distinctive color (that doesn't seem useful: the letters+numbers pattern is already visually distinctive)? Do you mean the tag should be restricted, in which case I have no idea why it would be?

  • Why wouldn't it get tagged with both? I meant that you shouldn't be able to delete and/or add them. Sep 20, 2012 at 15:48
  • @AlexChamberlain In this example, A is not directly relevant to the question. A question tagged a prior-art would be looking for prior art to A. Tags should delineate the subject of a question, not subjects that get an incidental mention. I don't see why you shouldn't be able to change these tags, like any other tag. Sep 20, 2012 at 15:56
  • But then only one question will ever be tagged with usaaaaa, which makes the tag redundant. Sep 20, 2012 at 15:58
  • @AlexChamberlain No, there can be multiple questions addressing different claims or looking for prior art in different venues. That being said, I'm not completely convinced that the per-patent tags are useful; maybe there should be a special search for “patent mentioned in the question” instead. Sep 20, 2012 at 16:28
  • I agree, that on any other SE site, we wouldn't allow such narrow tags, which is why I think they should be differentiated in some way. The only reason to keep them is for the searching capability. Sep 20, 2012 at 16:34
  • What about patents.stackexchange.com/q/306/345? Should that be tagged with all 3 patents and 4 design patents? Sep 21, 2012 at 13:43

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