Average Co-Inventor Count = 4.20
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. Dai Nippon Printing Co., Ltd. (2 from 3,192 patents)
2 patents:
1. 12130182 - Transmission type color gradation chart, transmission type color gradation chart device and gray gradation chart
2. 12048415 - Color correction device for medical apparatus