Average Co-Inventor Count = 6.46
ph-index = 2
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. Sumitomo Rubber Industries Limited (2 from 4,415 patents)
2 patents:
1. 5077336 - Low-temperature insulating material
2. 5006586 - Heat reserve material