Average Co-Inventor Count = 2.00
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. Gs Yuasa International Ltd. (2 from 720 patents)
2 patents:
1. D890097 - Vent plug for lead acid battery
2. D889407 - Lead acid battery