Average Co-Inventor Count = 2.90
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. Matsushita Electric Industrial Co., Ltd. (7 from 27,375 patents)
7 patents:
1. 6657941 - Recording/reproducing device
2. 6580800 - Acoustic transducer
3. 6052254 - Two-part rotatable cover apparatus for tape cassette with lock mechanism
4. 5544253 - Earphone assembly
5. 5432660 - Two-part slidable cover apparatus for tape cassette with lock mechanism
6. 5393110 - Cover opening/closing device
7. 5153791 - Highly compact cassette player