Average Co-Inventor Count = 1.00
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)
1 patent:
1. 7658244 - Device for advancing drillings in the ground