Average Co-Inventor Count = 1.73
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. Sony Corporation (7 from 58,129 patents)
2. Apls Co., Ltd. (2 from 8 patents)
7 patents:
1. 6341693 - Storage case
2. 5860523 - Tape cassette receiving housing
3. 5777831 - Tape cassette
4. 5662850 - Method of manufacturing a tape guide roller for tape cassette
5. 5499714 - Tape cassette container casing
6. 5454501 - Tape guide roller for tape cassette
7. 5342001 - Tape cassette having a reel-locking or lid-locking device