Average Co-Inventor Count = 6.00
ph-index = 1
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. Sony Corporation (2 from 58,131 patents)
2 patents:
1. 5872692 - Recording/reproducing apparatus, magnetic head and tape cartridge
2. 5847906 - Recording/reproducing apparatus, magnetic head and tape cartridge