Average Co-Inventor Count = 5.62
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. Sony Corporation (3 from 58,129 patents)
3 patents:
1. 5982592 - Magnetic tape stabilizer for a recording and playback device
2. 5872692 - Recording/reproducing apparatus, magnetic head and tape cartridge
3. 5847906 - Recording/reproducing apparatus, magnetic head and tape cartridge