Average Co-Inventor Count = 1.15
ph-index = 16
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. Tombow Pencil Co., Ltd. (47 from 158 patents)
47 patents:
1. D902305 - Correction tape dispenser
2. D880586 - Correction tape dispenser
3. D593602 - Multicolored ballpoint pen
4. D590882 - Knock type eraser
5. D590884 - Pen clip
6. D581462 - Knock type eraser
7. D532044 - Ball point pen
8. D525301 - Ball point pen
9. 6899482 - Writing instrument
10. D500080 - Ball point pen
11. D499140 - Ball point pen
12. D497389 - Ball point pen
13. D490849 - Ball point pen
14. D490853 - Ball point pen
15. D489758 - Ball point pen