Average Co-Inventor Count = 19.01
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. Mitsubishi Jukogyo Kabushiki Kaisha (1 from 1,326 patents)
2. Shimizu Construction Co., Ltd. (1 from 116 patents)
1 patent:
1. 5221160 - Subterranean connecting method for construction of shield tunnel and