>>>>> On Tue, 26 Mar 2013, Julian H Stacey wrote: > OK I added Ulrich M to cc > He can add URL to wikipedia of expiry date of Japan IDEA paent > if he wants, or I will if he mails it me. > A dead patent is a good patent ;-)
IANAL, TINLA, but the term of patent in Japan seems to be 20 years and it was filed in 1991. Concerning the exact date, here's what I had written in my message to the FSF, about one year ago: | To the best of my knowledge, the IDEA algorithm was covered by the | following patents held by Ascom Tech AG, Bern, Switzerland: | - Europe: EP0482154 [1] | - U.S.: 5,214,703 [2] | - Japan: JP3225440 | These patents were filed in 1991. All sources (see [3] and [4] and | references cited therein) seem to agree that the European and the | Japanese patent both have expired on 2011-05-16. | | About the U.S. patent the situation seems not so clear, as there are | several expiry dates mentioned. The PGP FAQ [3] says it has expired on | 2010-05-25 whereas Wikipedia [4,5] mentions 2011-05-16 and 2012-01-07. | However, none of these dates is later than 2012-01-07. So I think it | is safe to assume that the U.S. patent has expired, too. | | [1] <http://register.epoline.org/espacenet/application?number=EP91908542> | [2] <http://www.google.com/patents?vid=5214703> | [3] <http://www.pgp.net/pgpnet/pgp-faq/#PATENT-IDEA> | [4] <http://en.wikipedia.org/wiki/International_Data_Encryption_Algorithm> | [5] <http://en.wikipedia.org/wiki/Talk:International_Data_Encryption_Algorithm#Explanation_of_U.S._patent_expiration> Ulrich _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users