Average Co-Inventor Count = 1.36
ph-index = 5
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 (5 from 58,132 patents)
5 patents:
1. D366415 - Tape cassette package
2. D362620 - Package for a tape cassette
3. D348391 - Package for a headphone
4. D313753 - Package for earphone
5. D284077 - Magnetic tape cassette