Average Co-Inventor Count = 2.00
ph-index = 5
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. (4 from 1,306 patents)
2. Dainippon Screen Seizo Kabushiki-kaisha (2 from 130 patents)
3. Kabushiki Kaisha Shashin Kogyo (2 from 2 patents)
6 patents:
1. 4757353 - Apparatus for setting regions to be trimmed on an original picture in a
2. 4746208 - Method and an apparatus for expanding magnification range of a
3. 4674867 - Photographic contact printing apparatus for duplicating of original
4. 4655583 - Apparatus for transporting a web of photosensitive material in a photo
5. 4383458 - Film cutter
6. 4382676 - Positioning machine of original films on a base sheet