Average Co-Inventor Count = 2.00
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. Nidec Sankyo Corporation (1 from 729 patents)
1 patent:
1. 7414926 - Optical head device that prevents the displacement of the optical axis caused by expansion or contraction due to temperature change