Average Co-Inventor Count = 1.33
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. Other (1 from 832,880 patents)
2. Certain-teed Products Corporation (1 from 2 patents)
2 patents:
1. 4021169 - Apparatus for the manufacture of siding
2. 4015925 - Extrusion equipment and especially die structure for making plastic