Average Co-Inventor Count = 1.64
ph-index = 3
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 Inc. (2 from 72 patents)
2. Shachibata Industrial Co., Ltd. (1 from 1 patent)
3 patents:
1. D584341 - Stamp
2. D543233 - Stamp
3. 4939990 - Multi-surfaced rotary stamping apparatus