Average Co-Inventor Count = 4.61
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. (4 from 42,508 patents)
2. Hitachi Car Engineering Co., Ltd. (2 from 248 patents)
3. Hitachi Automotive Engineering Co., Ltd. (2 from 152 patents)
4 patents:
1. 6055969 - Igniter for internal combustion engine having outer packing case
2. 5915367 - Igniter for internal combustion engine having outer packing case
3. 5842457 - Distributor for internal combustion engines
4. 5651352 - Distributor for internal combustion engines