Average Co-Inventor Count = 1.50
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. Toyo Roki Seizo Kabushiki Kaisha (2 from 41 patents)
2. Roki Co., Ltd. (1 from 13 patents)
3 patents:
1. 8394158 - Air cleaner
2. 7607198 - Hinge mechanism for air cleaner
3. 7296551 - Intake manifold