Average Co-Inventor Count = 2.40
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. Mannesmann Aktiengesellschaft (2 from 1,150 patents)
2 patents:
1. 4530225 - Bending skelp or strip into split tubes or pipes
2. 4148206 - Tube welding machine with exchangeable rolls