Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David John Cassimatis — 4 Patents

TATankbots: 4 patents #2 of 9Top 25%
Garland, TX: #307 of 1,186 inventorsTop 30%
Texas: #33,915 of 125,132 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
David John Cassimatis has been granted 4 US patents while listed as an inventor at Tankbots. The first was granted in 2021 and the most recent in March 2023. David John Cassimatis ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David John Cassimatis in Garland, TX, US.

Patents per Year

Patents granted per year, 2021 to 2023Bar chart with a peak of 2 patents in 2022.peak 22021: 1 patents20212022: 2 patents20222023: 1 patents2023

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11604180 Voltage differential reduction methods used while retrieving a mobile platform from a tank containing a hazardous, non-conductive substance John W. Meyers, Joseph A. Daily, Robert T. Effinger, IV, Donald A. Pontrelli, David L. Cheuvront +2 more 2023-03-14
11536705 Methods for controlling charge accumulation while operating a mobile platform immersed in a hazardous, non-conductive substance John W. Meyers, Joseph A. Daily, Robert T. Effinger, IV, Donald A. Pontrelli, David L. Cheuvront +2 more 2022-12-27
11415566 Methods utilizing a tethered buoyant body to retrieve a mobile platform from a tank containing a hazardous substance John W. Meyers, Joseph A. Daily, Robert T. Effinger, IV, Donald A. Pontrelli, David L. Cheuvront +2 more 2022-08-16
11181438 Methods for performing tasks in a tank containing hazardous substances John W. Meyers, Joseph A. Daily, David L. Cheuvront, James Todd Lovelace, Ronald Gillory 2021-11-23