Average Co-Inventor Count = 11.00
ph-index = 4
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. Building Materials Investment Corporation (2 from 284 patents)
2. Elk Premium Building Products, Inc. (2 from 25 patents)
4 patents:
1. 8316608 - Enhanced multi-layered shingle
2. 8127514 - Enhanced multi-layered shingle
3. 8006457 - Enhanced multi-layered shingle
4. 7833371 - Enhanced multi-layered shingle