Average Co-Inventor Count = 5.46
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, Ltd. (2 from 42,488 patents)
2. Hitachi Car Engineering Co., Ltd. (1 from 248 patents)
2 patents:
1. 6997051 - Flow sensing device and electronics apparatus
2. D447972 - Air flow senser for motorcar