Average Co-Inventor Count = 2.71
ph-index = 6
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. Hitachi Maxell, Limited (16 from 1,112 patents)
2. Hitachi, Ltd. (11 from 42,517 patents)
3. Hitachi Maxwell, Ltd. (2 from 56 patents)
4. Other (1 from 832,912 patents)
5. Teac Corporation (1 from 1,030 patents)
6. Taec Corporation (1 from 1 patent)
19 patents:
1. 6224007 - Tape cassette
2. 5927632 - Tape cassette having a surface recess for positioning accuracy in
3. 5798899 - Tape cartridge with an upper case wall cover plate
4. 5706146 - Cassette detecting and discriminating arrangement in a cassette
5. 5702062 - Tape cassette
6. 5602695 - Cassette loading mechanism for recording and playback apparatus
7. 5556051 - Tape cartridge having a front lid with a covering wall
8. 5537279 - Tape cassette and magnetic recording/reproducing device
9. 5503348 - Opening and closing of a front lid of a tape cartridge
10. 5497279 - Tape cartridge and recording reproduction apparatus for the tape
11. 5479312 - Tape cartridge system implementing variable sized tape cartridges
12. 5454527 - Tape cartridge
13. 5295637 - Cassette lid-locking element with shutter portion for closing a light
14. D331926 - Magnetic tape cassette
15. 4932604 - Tape cartridge