Average Co-Inventor Count = 1.41
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. Shachihata Industry Co., Ltd. (2 from 8 patents)
2. Director-general of the Agency of Industrial Science and Technology (1 from 77 patents)
3. Shachihata Industrial Co., Ltd. (1 from 25 patents)
4. Shachihata Kogyo K.k. (1 from 1 patent)
4 patents:
1. D284014 - Stamp
2. 4556096 - Method for the preparation of a spongy metallic body
3. D280643 - Combined stamp and cap therefor
4. D280644 - Combined stamp and cap therefor