Average Co-Inventor Count = 4.00
ph-index = 1
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-Kokusai Electric Inc. (1 from 1,258 patents)
2. Tokyo Gas Company Limited (1 from 193 patents)
2 patents:
1. 6514869 - Method for use in manufacturing a semiconductor device
2. 5423578 - Coupling for corrugated pipe