Average Co-Inventor Count = 4.44
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. The Japan Steel Works, Ltd. (2 from 413 patents)
2 patents:
1. 5578206 - Screen pack replacing apparatus
2. 4679461 - Drive device for two-shaft extruding machine