Average Co-Inventor Count = 2.40
ph-index = 1
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 Bakelite Company Limited (2 from 615 patents)
2 patents:
1. 10433713 - Anti-leak valve unit for overtube
2. D624181 - Air-tight valve for overtube