Average Co-Inventor Count = 2.00
ph-index = 1
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. Kotobuki Co., Ltd. (1 from 294 patents)
2. Suhan Corporation (1 from 4 patents)
1 patent:
1. 8604100 - Ink composition for oil-based ballpoint pen