Average Co-Inventor Count = 3.00
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. Nsk Corporation (2 from 2,433 patents)
2 patents:
1. 5644493 - Production information processing system
2. 5444844 - Figure drawing apparatus and inventory purchasing system using the same