Average Co-Inventor Count = 5.14
ph-index = 3
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. Hitachi, Ltd. (3 from 42,485 patents)
3 patents:
1. 5683178 - Apparatus for producing high viscosity materials and method of producing
2. 5674956 - Method for producing high viscosity materials
3. 4602873 - Vibration-controlling bearing