Average Co-Inventor Count = 2.00
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. Nkk Corporation (3 from 614 patents)
2. Kabushiki Kaisha Nikkyo Seisakusho (3 from 3 patents)
3 patents:
1. 5392266 - Automatic disc exchange apparatus
2. 5353269 - Disk storage apparatus
3. 5033038 - Automatic disk exchange device