Average Co-Inventor Count = 2.00
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. Said Iwao Yamamoto, by Said Moriro Koga (1 from 1 patent)
1 patent:
1. 4101797 - Off center electrode spark plug