Average Co-Inventor Count = 8.00
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. Hitachi Shipbuilding & Eng. Co., Ltd. (1 from 2 patents)
1 patent:
1. 4090460 - Spherical tank supporting system for low temperature liquified gas