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. Sanyo Electric Co., Ltd. (4 from 8,780 patents)
4 patents:
1. 7934226 - Optical pickup apparatus
2. 7665101 - Optical pickup apparatus
3. 7471613 - Optical pickup device
4. 7440385 - Optical pickup device