Average Co-Inventor Count = 2.56
ph-index = 4
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. Toyo Roki Seizo Kabushiki Kaisha (3 from 41 patents)
2. Nissan Motor Company Limited (2 from 13,402 patents)
3. Hamamatsu-photonics K.k. (1 from 2,935 patents)
4. Toyo Jozo Company, Ltd. (1 from 48 patents)
5 patents:
1. 7635427 - Ion exchange filter
2. 7261816 - Ion-exchange filter
3. 7097763 - Ion exchange filter apparatus
4. 5136373 - Image processing apparatus
5. 5043279 - DNA encoding a bacillus creatinase