Average Co-Inventor Count = 3.07
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, Ltd. (2 from 42,488 patents)
2. Dai Nippon Printing Co., Ltd. (1 from 3,192 patents)
3 patents:
1. 12252317 - Barrier film and packaging material
2. 11958513 - Railroad car condition monitoring/analyzing device and method
3. 7360492 - Railway car with overload detector