Average Co-Inventor Count = 4.00
ph-index = 1
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. Hitachi, Ltd. (2 from 42,485 patents)
2 patents:
1. 12042877 - Welding management system
2. 7942322 - Work instruction management system, work instruction management method, work instruction management apparatus and electronic paper