Average Co-Inventor Count = 5.22
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. Suzuki Shokan Co., Ltd. (2 from 5 patents)
2. Matsushita Electric Industrial Co., Ltd. (1 from 27,375 patents)
3 patents:
1. 5976725 - Fuel cell system, fuel feed system for fuel cell and portable electric
2. 4721697 - Substance for reversibly absorbing and desorbing hydrogen
3. 4629720 - Substance for reversibly absorbing and desorbing hydrogen