Average Co-Inventor Count = 3.00
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. Wirth Maschinen-und Bohrgerate-fabrik Gmbh (1 from 24 patents)
2. Hdrk Mining Research Limited (1 from 3 patents)
1 patent:
1. 5340199 - Method and machine for excavating drifts, tunnels, stopes, caverns or