Average Co-Inventor Count = 3.70
ph-index = 3
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. (3 from 42,526 patents)
2. Somar Corporation (1 from 210 patents)
3. Hitachi Automotive Engineering Co., Ltd. (1 from 152 patents)
3 patents:
1. 5276073 - Thermosetting resin composition comprising maleimide, anhydride, epoxy
2. 5179864 - Starter having a contaminant-proof struture of a sliding portion
3. 4027642 - Intake air heating device for use in internal combustion engine