Average Co-Inventor Count = 3.00
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. Nikko Chemical Institute Inc. (2 from 3 patents)
2. Toyoko Giken Co., Ltd. (2 from 2 patents)
2 patents:
1. 5534214 - Process for coloring concrete
2. 5476722 - Concrete coloring material and process for coloring concrete