Average Co-Inventor Count = 2.57
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. Kawasaki Steel Corporation (3 from 1,256 patents)
2. Furukawa Aluminum Co., Ltd. (3 from 35 patents)
3. C. Itoh & Co., Ltd. (3 from 13 patents)
3 patents:
1. 4829799 - Method of manufacturing substrate for memory disk
2. 4825680 - Method of manufacturing metal substrates for disk for memory storage
3. 4823578 - Method of manufacturing substrate for memory disk