Average Co-Inventor Count = 4.00
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 Koki Co., Ltd. (2 from 1,267 patents)
2. Hitachi, Ltd. (1 from 42,485 patents)
2 patents:
1. 5703145 - Hot melt type ink composition for ink jet
2. 5350789 - Hot-melt ink composition