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USPTO Patent Rankings Data through Dec 31, 2025
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Leen Hellenberg — 9 Patents

FMFluid Management: 4 patents #5 of 85Top 6%
Delft, NL: #60 of 1,192 inventorsTop 6%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Leen Hellenberg has been granted 9 US patents while listed as an inventor at Fluid Management. The first was granted in 1990 and the most recent in February 2010. Leen Hellenberg ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Leen Hellenberg in Delft, NL.

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
7654416 Fluid and hair-dye dispensers Eric Buining, Wilhelmus van Westerop, Johannes Hendrikus Mink 2010-02-02
7597217 Two disc valve pump assembly for a fluid dispenser Johannes Hendrikus Mink, Wilhelmus van Westerop, Renautus Petrus Cornelis Neeuwisse, Eric Buining, Adriaan Kuipers 2009-10-06
7185789 Hair dye dispenser Johannes Hendrikus Mink, Wilhelmus van Westerop, Renautus Meeuwisse, Eric Buining, Adriaan Kuipers 2007-03-06
7121430 Fluid and hair-dye dispensers Johannes Hendrikus Mink, Wilhelmus van Westerop, Renautus Meeuwisse, Eric Beuning, Ad Kuljpers 2006-10-17
D500625 Dispenser apparatus Mitch Saranow, Johannes Hendrikus Mink, Heller Mathis, Wilhemus Quirinus Laurentius Van Westerop, Mathijs Van Dijk 2005-01-11
5268620 Mixing apparatus 1993-12-07
5119973 Automated dispensing apparatus William A. Miller 1992-06-09
5078302 Paint dispensing apparatus 1992-01-07
4967938 Paint dispensing apparatus 1990-11-06