Average Co-Inventor Count = 6.18
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. Shin Nisso Kako Co., Ltd. (4 from 23 patents)
2. Shin Nisso Kako Cp., Ltd. (1 from 1 patent)
5 patents:
1. 4695640 - Addition compound of fluoran compounds and ketone
2. 4665199 - 3-N-isobutylethylamino-6-methyl-7-phenylaminofluoran
3. 4642357 - Chromogenic recording materials
4. 4613879 - Chromogenic recording materials
5. 4590498 - Chromogenic recording materials