Average Co-Inventor Count = 1.33
ph-index = 4
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 of America, Ltd. (2 from 23 patents)
2. Other (1 from 832,718 patents)
3. Pentel of American, Ltd. (1 from 1 patent)
4 patents:
1. D366497 - Writing instrument
2. D359759 - Cap for a writing instrument
3. D359757 - Writing instrument
4. 5108287 - Autoclavable drill bit container