Average Co-Inventor Count = 3.27
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. Mabuchi Motor Co., Ltd. (2 from 264 patents)
2 patents:
1. 5272404 - Miniature motor having a built-up commutator
2. 4529899 - Leaf brushes for small electric motor