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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DD

David Doe — 7 Patents

Walpole, MA: #38 of 213 inventorsTop 20%
Massachusetts: #18,077 of 88,656 inventorsTop 25%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
David Doe has been granted 7 US patents. The first was granted in 1998 and the most recent in January 2016. David Doe ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list David Doe in Walpole, MA, US.

Patents per Year

Patents granted per year, 1998 to 2016Bar chart with a peak of 1 patents in 1998.peak 11998: 1 patents19982001: 1 patents20012003: 1 patents20032006: 1 patents20062012: 1 patents20122013: 1 patents20132016: 1 patents2016

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
9235972 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2016-01-12
8466795 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2013-06-18
8149124 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2012-04-03
7038590 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2006-05-02
6624754 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2003-09-23
6239700 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 2001-05-29
5742233 Personal security and tracking system Mark Hoffman, Judd Hoffman, Ann Hoffman 1998-04-21