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. Mine Safety Appliances Company (2 from 242 patents)
2 patents:
1. 4840859 - Thermal battery
2. 4675256 - Thermal battery comprising iron pyrite depolarizer and ferric sulfate