Average Co-Inventor Count = 6.46
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. Taiheiyo Engineering Corporation (1 from 18 patents)
2. Taiiheiyo Engineering Incorporated (1 from 1 patent)
2 patents:
1. 4027918 - Longwall coal mining machine with plural cutters on sub-ranging arm
2. 4002037 - Self-advancing support for use in the pit of coal or metal mine