Growing community of inventors

Castrop-Rauxel, Germany

Heinrich Stukenkemper

Average Co-Inventor Count = 1.00

ph-index = 6

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 125

Heinrich StukenkemperHeinrich Stukenkemper (15 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Faber-castell Ag (11 from 45 patents)

2. Rotring International Gmbh & Co. Kg (2 from 8 patents)

3. Sanford Gmbh (1 from 386 patents)


15 patents:

1. D898826 - Writing instrument

2. 9364062 - Case

3. D692487 - Cap for a writing utensil

4. D645083 - Writing instrument

5. D641042 - Writing implement

6. D633943 - Writing instrument

7. D631915 - Eraser

8. D628241 - Writing instrument

9. 7828138 - Case

10. D624592 - Sharpener/eraser

11. D622319 - Sharpener

12. D621875 - Writing implement

13. D446242 - Writing instrument

14. D414203 - Fountain pen

15. D412183 - Ball point pen

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as of
12/17/2025
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