Average Co-Inventor Count = 1.17
ph-index = 18
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. Pentel Kabushiki Kaisha (39 from 264 patents)
2. Pentel Kabushiki Kaisha D.b.a. Pentel Co., Ltd. (1 from 2 patents)
3. Pentel K.k. (1 from 1 patent)
41 patents:
1. D594060 - Ballpoint pen
2. D593606 - Ballpoint pen
3. D584357 - Cap for a writing instrument
4. D572756 - Mechanical pencil
5. D547801 - Marking pen
6. D499139 - Ball point pen
7. D492722 - Marking pen
8. D490105 - Ball point pen
9. D460486 - Cap for a writing instrument
10. D460114 - Cap for a writing instrument
11. D459757 - Cap for a writing instrument
12. D458965 - Ball point pen
13. D458966 - Ballpoint pen cap
14. D456844 - Correction pen
15. D455179 - Clip for a writing instrument