Average Co-Inventor Count = 2.40
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. Other (1 from 832,812 patents)
2. Bochumer Eisenhutte Heintzmann & Company (1 from 26 patents)
2 patents:
1. 4378132 - Mining method and apparatus
2. 4277204 - Excavation roof support and method of installing the same