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Stanford University was granted two new patents today under the name, Scoring documents in a database, both of which were filed at the United States Patent and Trademark Office on January 19, 2010. These two patents, assigned to Stanford and listing Lawrence Page as inventor, are described as continuation patents of the following patents assigned to Stanford which focus upon PageRank: | Stanford University was granted two new patents today under the name, Scoring documents in a database, both of which were filed at the United States Patent and Trademark Office on January 19, 2010. These two patents, assigned to Stanford and listing Lawrence Page as inventor, are described as continuation patents of the following patents assigned to Stanford which focus upon PageRank: | ||
| − | * Method for node ranking in a linked database (US Patent 6,285,999), filed on January 9, 1998 | + | * '''[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=1&f=G&l=50&d=PALL&S1=06285999&OS=PN/06285999&RS=PN/06285999 Method for node ranking in a linked database]''' (US Patent 6,285,999), filed on January 9, 1998 |
| − | * Method for node ranking in a linked database (US Patent 7,058,628), filed July 2, 2001 | + | * '''[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=1&f=G&l=50&d=PALL&S1=07058628&OS=PN/07058628&RS=PN/07058628 Method for node ranking in a linked database]''' (US Patent 7,058,628), filed July 2, 2001 |
| − | * Scoring documents in a linked database (US Patent 7,269,587), Filed December 1, 2004 | + | * '''[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=1&f=G&l=50&d=PALL&S1=07269587&OS=PN/07269587&RS=PN/07269587 Scoring documents in a linked database]''' (US Patent 7,269,587), Filed December 1, 2004 |
'''The Old PageRank Claims''' | '''The Old PageRank Claims''' | ||
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Where the main differences appear are in the claims section of each of those patents. The 1998 patent covers many of the topics mentioned in the description section of the patent, but in a very general manner. For example, we see the following claim in that patent: | Where the main differences appear are in the claims section of each of those patents. The 1998 patent covers many of the topics mentioned in the description section of the patent, but in a very general manner. For example, we see the following claim in that patent: | ||
| − | + | '' 4. The method of claim 1, wherein the assigning includes: | |
| − | + | identifying a weighting factor for each of the linking documents, the weighting factor being dependent on the URL, host, domain, author, institution, or last update time of the one or more linking documents, and | |
| − | + | adjusting the score of each of the one or more linking documents based on the identified weighting factor.'' | |
The 2001 patent provides a very brief two paragraph claims section that doesn’t address very much of the description section, The 2004 patent claims section focuses more specifically upon how PageRank might be calculated between pages without looking at different weighting factors like the first patent. | The 2001 patent provides a very brief two paragraph claims section that doesn’t address very much of the description section, The 2004 patent claims section focuses more specifically upon how PageRank might be calculated between pages without looking at different weighting factors like the first patent. | ||
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The new PageRank patents are: | The new PageRank patents are: | ||
| − | * Scoring documents in a database (US Patent 8,131,717) Filed January 19, 2010, granted March 6, 2012, assigned to The Board of Trustees of the Leland Stanford Junior University | + | * '''[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=1&f=G&l=50&d=PALL&S1=08131717&OS=PN/08131717&RS=PN/08131717 Scoring documents in a database]''' (US Patent 8,131,717) Filed January 19, 2010, granted March 6, 2012, assigned to The Board of Trustees of the Leland Stanford Junior University |
| − | * Scoring documents in a database (US Patent 8,131,715) Filed January 19, 2010, granted March 6, 2012, assigned to The Board of Trustees of the Leland Stanford Junior University | + | * '''[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=1&f=G&l=50&d=PALL&S1=08131715&OS=PN/08131715&RS=PN/08131715 Scoring documents in a database]''' (US Patent 8,131,715) Filed January 19, 2010, granted March 6, 2012, assigned to The Board of Trustees of the Leland Stanford Junior University |
Here are some of the things that appear in the Claims sections of these new patents that aren’t in the old ones, even though they are referred to in the descriptions for those patents: | Here are some of the things that appear in the Claims sections of these new patents that aren’t in the old ones, even though they are referred to in the descriptions for those patents: | ||
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