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USPTO Patent Rankings Data through Dec 31, 2025
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Douglas Rumsam — 6 Patents

CCCitadel Casing: 6 patents #1 of 7Top 15%
Hong Kong, CN: #346 of 3,463 inventorsTop 10%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Douglas Rumsam has been granted 6 US patents while listed as an inventor at Citadel Casing. The first was granted in 2019 and the most recent in May 2025. Douglas Rumsam ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Douglas Rumsam in Hong Kong, CN.

Patents per Year

Patents granted per year, 2019 to 2025Bar chart with a peak of 2 patents in 2024.peak 22019: 1 patents20192021: 1 patents20212022: 1 patents20222024: 2 patents20242025: 1 patents2025

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
D1075517 Bottle case Timothée Lesné, Lewis Cheng, Andy Wong 2025-05-20
D1043370 Packaging Timothée Lesné 2024-09-24
11866236 Folding tamper-proof case with reinforcing inserts Timothée Lesné, Lewis Cheng, Andy Wong 2024-01-09
11492173 Folding case and methods thereof Timothée Lesné, Lewis Cheng, Andy Wong 2022-11-08
10994889 Folding tamper-proof case and methods thereof Timothée Lesné, Lewis Cheng, Andy Wong 2021-05-04
10479597 Tamper-proof case systems and methods Lewis Cheng, Timothée Lesné, Victor Hugo Ocegueda Gallaga, Yifeng Zhang, Jaime Ramos 2019-11-19

Frequent Collaborators

Timothée Lesné6 shared
Lewis Cheng5 shared
Andy Wong4 shared
Victor Hugo Ocegueda Gallaga1 shared
Jaime Ramos1 shared
Yifeng Zhang1 shared

Nearby-Ranked Inventors

Aurélien Joulia6
Michael F. Vollero6
Stefano Fracassi6
Uwe Gruenbeck6
Alexander Matrosov6
Rouzbeh Behnia6
Carole Chapelat6
Mina Sedaghat6
Martinus Johannes Donatus Brakkee6