Average Co-Inventor Count = 1.86
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. China Railway Tunnel Group Co., Ltd. (1 from 5 patents)
2. China Railway Tunnel Stock Co., Ltd. (1 from 2 patents)
3. Henan Nanhua Qianmu Biotechnology Co., Ltd. (1 from 1 patent)
2 patents:
1. D971071 - Artificial plant
2. 11371348 - Pipeline annular self-traveling guide apparatus and method