Average Co-Inventor Count = 1.80
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. Mitsubishi Kasei Engineering Company (1 from 7 patents)
2. Ryoka Techno Engineering & Construction Co. (1 from 4 patents)
3. Ryoka Techono Engineering & Construction Co. (1 from 1 patent)
3 patents:
1. 5295805 - Rotating cylindrical treatment apparatus
2. 5277108 - Rotating cylindrical treatment apparatus
3. 4934928 - Rotating-drum heat treatment apparatus