Average Co-Inventor Count = 4.50
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 58,131 patents)
3 patents:
1. 6084736 - Reading device for reading identification information of a cartridge
2. 5905604 - Cassette transfer mechanism for use in cassette library system
3. 5742570 - Cartridge auto-changer