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.
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