Tim Churches <[EMAIL PROTECTED]> wrote: > malkarouri wrote: > > On 13 Jul, 17:18, 78ncp <[EMAIL PROTECTED]> wrote: > >> hi... > >> how to implementation algorithm latent semantic indexing in python > >> programming...?? > > > > Of course you are aware that LSA is patented.. > > There is a US patent on it, sealed in 1989, but is it patented in any > other countries? There is no such thing as a "global patent" - patents > only cover the country which issues them. There is a global patent > application process (the Patent Co-operation Treaty), but that just > establishes a priority date for the invention in each country, but the > inventor still needs to file patent applications and have them approved > (sealed) is each and every country. Did Bellcore do that back in the 1980s?
Aren't patents supposed to last 17 years, anyway? A patent granted in 1989 should have expired in 2006, I believe (though IANAL, so...). Alex -- http://mail.python.org/mailman/listinfo/python-list
