Average Co-Inventor Count = 1.20
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. Sony Corporation (9 from 58,131 patents)
9 patents:
1. D383400 - Navigational location system
2. D353817 - Headphone
3. D350749 - Tape player combined with a radio receiver
4. D337589 - Earphone
5. D336473 - Combined tape recorder and radio tuner
6. D336294 - Tape player
7. D336296 - Tape player
8. D335278 - Battery charger for a tape player
9. D323155 - Hand held data input terminal for video monitor