Average Co-Inventor Count = 2.67
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. Sonoco Products Company (2 from 185 patents)
2 patents:
1. 5881898 - Open top drum having ribbed chime
2. D359150 - Drum