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. Kabushiki Kaisha Komatsu Seisakusho (2 from 1,009 patents)
2 patents:
1. 5330292 - System and method for transmitting and calculating data in shield machine
2. 5199818 - Method and apparatus for detecting collapse of natural ground in shield