Average Co-Inventor Count = 3.27
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 58,130 patents)
3 patents:
1. 6428325 - Rotatable electrical connector for telephone cord
2. 5835587 - Telephone having a hold function
3. 5784458 - Telephone having a hold function