For the Inventor, By the Inventor

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Frankfurt-am-Main, Germany

Hartmann Druckfarben, Gmbh

USPTO Granted Patents = 1

Forward Citations = 1

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6 inventors (with patents filed for the assignee):

Ludwig Schieferstein (1 out of 27 patents)

Herbert Fischer (1 out of 54 patents)

Wolfgang Ritter (1 out of 55 patents)

4. Michael Beck (1 out of 4 patents)

5. Quang-Minh Thai (1 out of 1 patent)

6. Udo Griebsch (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 5932629 - Anion-based aqueous printing inks with improved deinkability (1999-08-03),

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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#225 in Frankfurt-am-Main

#15,119 in Germany

Frankfurt-am-Main, Germany

Hartmann Druckfarben, Gmbh

Forward Citations = 1

6 inventors:

Ludwig Schieferstein (1 out of 27 patents)

Herbert Fischer (1 out of 54 patents)

Wolfgang Ritter (1 out of 55 patents)

4. Michael Beck (1 out of 4 patents)

5. Quang-Minh Thai (1 out of 1 patent)

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