Average Co-Inventor Count = 1.33
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. Seiko Epson Corporation (1 from 33,442 patents)
2. Epson Imaging Devices Corporation (1 from 169 patents)
2 patents:
1. 7708449 - Illumination device and liquid crystal display apparatus
2. 7490973 - Lighting device, electro-optical device and electronic apparatus