Average Co-Inventor Count = 1.07
ph-index = 9
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 (22 from 264 patents)
2. Pentel of America, Ltd. (1 from 23 patents)
23 patents:
1. D978244 - Ballpoint pen
2. D956869 - Ballpoint pen
3. D956870 - Ballpoint pen
4. D902311 - Ballpoint pen
5. D876541 - Mechanical pencil
6. D846640 - Mechanical pencil
7. D839348 - Ballpoint pen
8. D822112 - Ballpoint pen
9. D724669 - Mechanical pencil
10. D648790 - Ballpoint pen
11. D603897 - Mechanical pencil
12. D585936 - Ballpoint pen
13. D576678 - Cap for a writing instrument
14. D541869 - Case for refillable leads for a mechanical pencil
15. D538854 - Writing instrument