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 patents:
1. 8579042 - Battery pack and cordless tool using the same
2. 8381829 - Battery pack and cordless tool using the same