Average Co-Inventor Count = 2.40
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. Idemitsu Petrochemical Co., Ltd. (2 from 555 patents)
2 patents:
1. 5258206 - Method and apparatus for producing diamond thin films
2. 5135807 - Diamond-coated member and process for the preparation thereof