Average Co-Inventor Count = 5.00
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. (2 from 1,306 patents)
2 patents:
1. 6334392 - Drawing apparatus having fixing member for clamping material on drum
2. 6164204 - Drawing apparatus having fixing member for clamping material on drum and