Average Co-Inventor Count = 1.08
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. Kai R$d Center Co., Ltd. (7 from 166 patents)
2. Sumitomo Seika Chemicals Co., Ltd. (302 patents)
7 patents:
1. 9919440 - Razor
2. 9889570 - Razor with attached shaving aid
3. 9796101 - Razor
4. 9498892 - Pivoting razor
5. D662663 - Safety razor
6. D627929 - Safety razor handle
7. D614352 - Safety razor