Average Co-Inventor Count = 7.31
ph-index = 3
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. Bridgestone Corporation (3 from 5,120 patents)
2. Seiko Electronic Components Ltd. (1 from 26 patents)
3 patents:
1. 5057387 - Lithium cells
2. 4960657 - Lithium cells
3. 4939050 - Electric cells