Average Co-Inventor Count = 4.35
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 (5 from 2,861 patents)
5 patents:
1. 4400744 - Cassette tape player
2. 4379314 - Cassette tape player
3. 4377829 - Player for magnetic tape cartridge recordings
4. 4369474 - Player for magnetic tape cartridge recordings
5. 4368494 - Player for magnetic tape cartridge recordings