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Do you know of any patent search tool that allows you to search text within a predetermined set of patents? preferably free tool.

Or alternatively, somewhere I can download the text of the set of patents I'm interested so that I can do local searches? Notice I have the pdf documents for these patents, downloaded from google patents, however these are scans with not too much quality -- and a local OCR doesn't seem to be able to get the correct text.

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It may depend on how big your search set is. Are you contemplating a more sophistiated search than what you can accomplish by refining search results at the USPTO search site? –  Yorick Jan 22 '13 at 19:11
    
I'm writing my first patent and I just wanted to see how certain terms are used within a set of prior art patents. So if I could do free text searches on this set it would be fantastic. Set size is around 50 patents. –  martinako Jan 23 '13 at 12:54
    
If you search this forum, you will find some different views on drafting your own patent. Feel free to ask additional questions here. Good luck. –  Yorick Jan 23 '13 at 13:41
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Expanding on Yorick's answer - I do not often recommend the USPTO search tools but this is a good use for them as long as you are not looking anything pre-1976. You can definitely download text using that URL at the USPTO and do a local search. Or a boolean search like [PN/(7,849,039 OR 7,890,523 OR 7,895,230 OR 7,933,904 OR 7,941,428 OR 7,970,822) AND locate] on the USPTO site (under Advanced) would look for "locate" in all of the listed "OR'd" patents and return a list of only the patents with that text. Search result screen shot. Note that to get published U.S. applications the search would need to be re-run. Patents and Publications are not searchable at one place.

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Thanks for the info. For some reason my search PN/(20120212405 OR 20110285810) AND SPEC/"motion sensors" is not working. In fact I haven't been able to find the patents by number so I'm not sure if I'm using the right number or they just don't have these particular patents –  martinako Jan 23 '13 at 12:49
    
The Uspto search separates applications and granted patents. The numbers in your example are published applications (they start with a year). The URL is appft1.uspto.gov/netahtml/PTO/search-bool.html and the field is DN for document number vs PN –  George White Jan 23 '13 at 19:38
    
Ok, that worked well! Thank you very much –  martinako Jan 23 '13 at 21:30
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Free boolean search tool, can refine search results:

http://patft.uspto.gov/netahtml/PTO/search-bool.html

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Pattools is nice. I don't know if it has the exact features you are looking for, but it does allow you to give a list of patents. It returns the specifications and claims for those patents in a much nicer format than the PDF. It also allows you to download the PDF.

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