Average Co-Inventor Count = 3.43
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. Dainippon Screen Mfg. Co., Ltd. (1 from 1,306 patents)
2. Dainippon Screen Seizo Kabushiki-Kaisha (1 from 130 patents)
2 patents:
1. 4868884 - Image extraction mask
2. 4222247 - Needle selection mechanism for an automatic knitting machine