Average Co-Inventor Count = 5.35
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. Kabushiki Kaisha Sankyo Seiki Seisakusho (3 from 307 patents)
2. Nippon Hoso' Kyokai (1 from 374 patents)
3 patents:
1. 5373404 - Helical scan type rotary head drum unit
2. 5270890 - Helical scan type rotary head apparatus
3. 5206771 - Tape drive mechanism