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. Nippon Seiko Kabushiki Kaisha (1 from 355 patents)
2. Nippon Seiko K.k. (1 from 12 patents)
3. Kokushin Sanhyo Kabushiki Kaisha (1 from 1 patent)
2 patents:
1. D307834 - Child car seat
2. 4765685 - Child seat arrangement