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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Glen Wade Duff — 11 Patents

ZUZup: 9 patents #1 of 3Top 35%
Williamsburg, VA: #34 of 341 inventorsTop 10%
Virginia: #2,746 of 34,511 inventorsTop 8%
Overall (All Time): #435,149 of 4,157,543Top 15%
11 Patents All Time
Glen Wade Duff has been granted 11 US patents while listed as an inventor at Zup. The first was granted in 1999 and the most recent in March 2021. Glen Wade Duff ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Glen Wade Duff in Williamsburg, VA, US.

Patents per Year

Patents granted per year, 1999 to 2021Bar chart with a peak of 3 patents in 2019.peak 31999: 1 patents19992002: 1 patents20022012: 1 patents20122015: 2 patents20152018: 1 patents20182019: 3 patents20192020: 1 patents20202021: 1 patents2021

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
10940922 Aquatic board saddle 2021-03-09
10538296 Aquatic board saddle 2020-01-21
10449436 Skateboard with lateral wheel position 2019-10-22
10286987 Life jacket with visual awareness safety accessory 2019-05-14
D847927 Water recreation craft 2019-05-07
D834668 Water recreation craft 2018-11-27
9180942 Multifunctional engagement apparatus for a water recreation device and associated methods John Everett Martin 2015-11-10
9096296 Tow rope system and associated methods 2015-08-04
8292681 Water recreation device Timothy Walter Zeckser 2012-10-23
6382581 Paper easel 2002-05-07
5868373 Book easel 1999-02-09