Average Co-Inventor Count = 1.33
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. Weirton Steel Corporation (3 from 67 patents)
3 patents:
1. 5953810 - Weatherproofing for sheet metal roofing
2. D394718 - Roofing panel
3. D394719 - Roofing panel