Average Co-Inventor Count = 3.00
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. Nihon Parkerizing Co., Ltd. (1 from 128 patents)
1 patent:
1. 6139973 - Method for forming wear-resistant layer and iron-based material, on