Average Co-Inventor Count = 1.11
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. Kabushiki Kaisha Pilot Corporation (7 from 173 patents)
2. Fujitsu Corporation (1 from 39,237 patents)
8 patents:
1. D886193 - Pen
2. D789452 - Marking pen
3. D768777 - Ballpoint pen with stylus
4. D744037 - Marking pen
5. D603454 - Cap of pen
6. D602526 - Ballpoint pen
7. D602085 - Ballpoint pen
8. 4400769 - Virtual machine system