Average Co-Inventor Count = 4.36
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 58,129 patents)
2 patents:
1. 5909343 - Magnetic head and method for producing the same
2. 5883766 - Magnetic head with groove positioned to identify head orientation