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. Consolidation Coal Company (1 from 59 patents)
2. Consolication Coal Company (1 from 1 patent)
2 patents:
1. 4957405 - Apparatus for mining
2. 4798279 - Mine haulage method and apparatus