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. Koyo Seiko Company, Ltd. (2 from 772 patents)
2. Nippon Koshuha Steel Co., Ltd. (1 from 13 patents)
2 patents:
1. D372254 - Pivot bearing
2. 4911885 - High carbon chromium bearing steel