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USPTO Patent Rankings Data through Dec 31, 2025
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John Lefferts — 2 Patents

EMEmc: 2 patents #1,324 of 3,345Top 40%
Sutton, MA: #64 of 124 inventorsTop 55%
Massachusetts: #42,563 of 88,656 inventorsTop 50%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
John Lefferts has been granted 2 US patents while listed as an inventor at Emc. The first was granted in 2007 and the most recent in April 2013. John Lefferts ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John Lefferts in Sutton, MA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8433848 Analysis tool for a multi-tier storage environment Amnon Naamad, Lee W. Sapiro, Marik Marshak 2013-04-30 $66,747,000
7171338 Output performance trends of a mass storage system Kenneth R. Goguen, Maureen A. Lally, Paul F. Hale 2007-01-30 $73,403,000