Average Co-Inventor Count = 2.40
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 (2 from 58,130 patents)
2 patents:
1. 8670231 - Semiconductor recording medium recording and/or reproducing apparatus
2. 5528438 - Drum assembly having a lower fixed drum and an upper rotary drum with a