@article{13563,
      recid = {13563},
      author = {Lerner, Josh,},
      title = {150 years of patent protection /},
      pages = {38 pages + appendice ;},
      note = {This article was downloaded and printed from the RePEc  online archive. It was published in January 2000 as Working  Paper 7478 in the NBER Working Paper Series. see also  www.nber.org/papers/w7478.},
      url = {http://tind.wipo.int/record/13563},
}