Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Darrell J. Sanders — 7 Patents

CSContech Engineered Solutions: 6 patents #4 of 58Top 7%
CPContech Construction Products: 1 patents #7 of 10Top 70%
Mason, OH: #270 of 1,011 inventorsTop 30%
Ohio: #11,780 of 73,341 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Darrell J. Sanders has been granted 7 US patents while listed as an inventor at Contech Engineered Solutions. The first was granted in 1998 and the most recent in March 2022. Darrell J. Sanders ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Darrell J. Sanders in Mason, OH, US.

Patents per Year

Patents granted per year, 1998 to 2022Bar chart with a peak of 1 patents in 1998.peak 11998: 1 patents19982014: 1 patents20142016: 1 patents20162017: 1 patents20172019: 1 patents20192021: 1 patents20212022: 1 patents2022

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
11268256 Culvert system with flexible toe wall Brian Flint 2022-03-08
11174614 Metal foundation system for culverts, buried bridges and other structures Brian Flint, Matthew L. Westrich 2021-11-16
10378164 Reinforcement system and method for corrugated plate structures Brian Flint, Timothy J. Cormier 2019-08-13
9725873 Secondary containment system Timothy J. Cormier 2017-08-08
9290895 Corrugated metal plate assembly system and method Timothy J. Cormier 2016-03-22
8795777 Mine shaft liner plate system and method Vernon B. Cameron, Mark J. Swarny 2014-08-05
5720577 Box culvert Allan P. Schoulties 1998-02-24