Average Co-Inventor Count = 3.00
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. Sanyo Denki Co., Ltd. (2 from 321 patents)
2 patents:
1. 8172501 - Counter-rotating axial-flow fax
2. D602142 - Axial fan with double impellers rotating in mutually opposite directions