Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Michael Kirschbaum — 5 Patents

Merck: 4 patents #2,516 of 9,382Top 30%
DADegussa-Huels Ag: 1 patents #156 of 473Top 35%
Groß-Gerau, DE: #16 of 79 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Michael Kirschbaum has been granted 5 US patents while listed as an inventor at Merck. The first was granted in 2000 and the most recent in December 2009. Michael Kirschbaum ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Michael Kirschbaum in Groß-Gerau, DE.

Patents per Year

Patents granted per year, 2000 to 2009Bar chart with a peak of 3 patents in 2004.peak 32000: 1 patents20002004: 3 patents20042009: 1 patents2009

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7629493 Process for the crystallisation of guandinium salts Ekkehard Bartmann, Dieter Bensinger, Alexander Haas, Ricky Lippert 2009-12-08 $88,079,000
6706921 Method for producing sulfonyl-benzoyl guanidinium salts Ekkehard Bartmann 2004-03-16 $152,426,000
6685924 Conjugate, its preparation and use Herwig Buchholz, Ralf Anselmann, Hansjuergen Driller, Frank Pflucker 2004-02-03 $181,781,000
6673336 Conjugate, its preparation and use Herwig Buchholz, Eike Poetsch, Ralf Rosskopf, Ralf Anselmann, Frank Pflucker 2004-01-06 $83,959,000
6121487 Method of producing amino acids and amino-acid derivatives Annegret Vogt, Hans-Josef Altenbach, Michael Hahn, Mike Matthaus, Andreas Rainer Hermann 2000-09-19