Average Co-Inventor Count = 3.67
ph-index = 17
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 (9 from 284 patents)
2. Elk Premium Building Products, Inc. (6 from 25 patents)
3. Elk Corporation of Dallas (4 from 18 patents)
4. Elkcorp (1 from 14 patents)
20 patents:
1. 11002015 - Roofing material
2. 10995495 - Roofing material
3. 10415247 - Roofing material
4. 9845602 - Roofing material
5. 9538762 - Antimicrobial delivery system for roof coverings
6. 9279255 - Light weight shingle
7. 9212487 - Enhanced single layer roofing material
8. 9021760 - Laminated roofing shingle system and shingles for use therein
9. 8763339 - Energy saving insulated shingle and method of manufacturing same
10. 8389103 - Roofing material
11. 8178449 - Fire resistant slipsheet
12. 7851051 - Roofing material
13. 6990779 - Roofing system and roofing shingles
14. 6936329 - Fastener-free composite roofing product
15. 6708456 - Roofing composite