Average Co-Inventor Count = 2.67
ph-index = 3
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. Pioneer Electronic Corporation (3 from 2,861 patents)
3 patents:
1. 5115362 - Cassette changer for tape player
2. 5006940 - Automatic changer for digital audio cassette tape player
3. 4974102 - Automatic changer for digital audio cassette tape player