Average Co-Inventor Count = 4.00
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. Yamaha Corporation (1 from 5,452 patents)
1 patent:
1. 7161137 - Optical transducer system having light emitting elements and light detecting elements both regulable in output characteristics