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. Hitachi Kiden Kogyo, Ltd. (2 from 6 patents)
2. Hitachi Kiden Kogyo Kabushiki Kaisha (1 from 9 patents)
3 patents:
1. 4739710 - Apparatus for conveyance with the aid of a magnetic liquid
2. 4457945 - Mushroom growing by utilizing sewage sludge compost and re-utilization
3. 4436026 - Empty can crusher