Hi, I have asked about the patents of Paxsos here, http://www.gossamer-threads.com/lists/linuxha/pacemaker/84309#84309
and now, I would like to just update our investigation about this. The booth uses Paxos algorithm, it seems to be issued as some US patents.. I believe that the booth is a great useful software. I'm really interested in using/developing the booth, and also investigating its non-infringement of the related patents. If the booth uses the Paxos algorithm in only US5261085 patent, we can use the booth without concern for the patent infringement. Because US5261085 has already expired. If anyone has information concerning these issues, please let me know. FYI: our investigation summary Mr. Leslie B. Lamport invented the Paxos, and he hold all of patents below. He had worked in DEC, and he belongs to Microsoft now. I searched Patents that relates the Paxos in Google. Keyword is 'Lamport Paxos'. I get the following results. [Patents related Paxos] US5261085 Fault-tolerant system and method for implementing a distributed state machine US7565433 Byzantine paxos US7558883 Fast transaction commit US7620680 Fast byzantine paxos US8005888 Conflict fast consensus US7711825 Simplified Paxos US7249280 Cheap paxos US7856502 Cheap paxos US7555516 Fast Paxos recovery US7698465 Generalized Paxos US8046413 Automatic commutativity detection for generalized paxos US7921424 Systems and methods for the repartitioning of data US7797457 Leaderless byzantine consensus US7849223 Virtually synchronous Paxos US8073897 Selecting values in a distributed computing system US20120239722 Read-only operations processing in a paxos replication system Mr.Leslie has published many papers about the Paxos, so the Paxos algorithm is well known. But it is groundless that we can use Paxos freely. He obtained patents of the above papers. US5261085 patent is a basis for the Paxos. It seems that the other patents related Paxos are the improvement of US5261085. According to the advice of the patent attorney, US5261085 has expired. Patents are valid for 20 years after they are registrated in US. Regards, Yusuke -- ---------------------------------------- METRO SYSTEMS CO., LTD Yusuke Iida Mail: yusk.i...@gmail.com ---------------------------------------- _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
