Average Co-Inventor Count = 3.43
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. Sharp Kabushiki Kaisha Corporation (2 from 25,537 patents)
2 patents:
1. 5309308 - Cassette-detection device for use in magnetic tape apparatuses
2. 5191490 - Auto reverse type tape player capable of selectively switching between a