Average Co-Inventor Count = 6.63
ph-index = 3
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 (1 from 284 patents)
2. Elk Premium Building Products, Inc. (1 from 25 patents)
3. Elk Corporation of Dallas (1 from 18 patents)
3 patents:
1. 9212487 - Enhanced single layer roofing material
2. 9021760 - Laminated roofing shingle system and shingles for use therein
3. 6289648 - Laminated roofing shingle