Six Degrees patent

The Six Degrees patent,[1][2] United States patent #6,175,831, "Method and apparatus for constructing a networking database and system", granted to Andrew Weinreich, et al., has been considered the definitive patent covering social networking by the owners of Tribe.net and LinkedIn.[3] The patent defined a social network as the ability to see the people you do not know through the people you do know, made possible by indexing people's relationships in a single database.[1][2] The patent was sold along with SixDegrees to YouthStream Media Networks in 2000 and later to Reid Hoffman of LinkedIn and Mark Pincus of Zynga and Tribe.net for $700,000 at an auction in 2003.[4] [5] [6] When explaining his reasoning for purchasing the Six Degrees patent, Hoffman stated, "Right now you're hearing a lot of spurious patent threats (...) And that's why I moved quickly to get a patent that was foundational."[7] He also commented on other entrepreneurs' views of social networking: "The general attitude among entrepreneurial people is that they think that they were first and that there is no history to what they are doing (...) Both Mark and I had tracked six degrees as an intellectual precursor to our own businesses."[3] Andrew Katz of Fox Rothschild, specialist in Internet intellectual property, said of Hoffman's and Pincus' acquisition of the patent: "It should be taken very seriously by everybody in the industry because it is in the hands of people who have the means and the business acumen to enforce it properly."[3]

References
  1. US patent US6175831, Andrew P. Weinreich, Mark R. Salamon, Shoshana Zilberberg, Nicole D. Berlyn, Leeann Mitchell, Cliff Rosen, Adam Seifer, Justin Green, David Haber, David Samuels, Ron Chibnik, Scott Clifford, Chandrasekhar Boddu, "Method and apparatus for constructing a networking database and system", published 2001-01-16, issued 2001-01-16
  2. "United States Patent 6,175,831". 2001-01-16.
  3. Riordan, Teresa (2003-12-01). "Idea for Online Networking Brings Two Entrepreneurs Together".
  4. Festa, Paul (2003-11-11). "Investors Snub Friendster in Patent Grab".
  5. McGrew, Scott (2012-04-01). "Who Owns Facebook's Most Important Patent? Not Facebook".
  6. Gannes, Liz (2012-02-09). "Who's Ready for the (Heaven Forbid) Social Networking Patent Wars?".
  7. Festa, Paul (2003-11-11). "Investors Snub Friendster in Patent Grab".
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