Average Co-Inventor Count = 4.20
ph-index = 2
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 (2 from 24 patents)
2. Hdrk Mining Research Limited (2 from 3 patents)
2 patents:
1. 5938288 - Automatic control system and method for a machine used for excavating
2. 5340199 - Method and machine for excavating drifts, tunnels, stopes, caverns or