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. Dong-a Pencil Co., Ltd. (6 from 39 patents)
6 patents:
1. D464083 - Ball-point pen
2. D463823 - Ball point pen
3. D463489 - Ball point pen
4. D447173 - Marking pen
5. D446813 - Ball point pen
6. D445830 - Ball point pen