Average Co-Inventor Count = 2.40
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. Yuasa Corporation (2 from 38 patents)
2. Other (1 from 832,718 patents)
2 patents:
1. 5750285 - Life indicator and lead-acid storage battery with life indicator
2. 5485744 - Sulfuric acid concentration sensor for lead storage battery