Average Co-Inventor Count = 2.43
ph-index = 4
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 (17 from 58,129 patents)
17 patents:
1. 7382324 - Recording/playback apparatus with electric wave transmission
2. 7324053 - Recording/playback apparatus with electric wave transmission
3. 7148853 - Recording/playback apparatus
4. 6950067 - Recording/playback apparatus with electric wave transmission
5. 6496314 - Recording/playback apparatus with electric wave transmission
6. 6456462 - Tape cassette and recording/reproducing apparatus
7. 6441993 - Cassette Holder
8. 6357858 - Printing device
9. 6305782 - Printing device
10. 6074039 - Printing device
11. 5966260 - Magnetic tape recording and reproducing apparatus having four heads and
12. 5790349 - Rotary head device
13. 5638232 - Recording and/or reproducing apparatus for tape-shaped recording medium
14. 5289324 - Cassette holder with means for opening and closing the closure member of
15. 5159507 - Tape recording and/or reproducing apparatus with a single motor for