Average Co-Inventor Count = 3.43
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 58,131 patents)
2 patents:
1. 5638232 - Recording and/or reproducing apparatus for tape-shaped recording medium
2. 5159507 - Tape recording and/or reproducing apparatus with a single motor for