Average Co-Inventor Count = 1.31
ph-index = 11
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. Sony Corporation (12 from 58,130 patents)
12 patents:
1. D348465 - Headphone
2. D348466 - Headphone
3. D347434 - Headphone
4. D345162 - Headphone
5. D345163 - Headphone
6. D338010 - Headphone
7. D337767 - Infra-red ray transmission machine for cordless headphone
8. D333560 - Earphone case
9. D328461 - Headphone
10. D325578 - Transmitter for a headphone
11. D319241 - Headphone
12. D316106 - Hand held copying machine