Average Co-Inventor Count = 5.21
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. Hitachi, Ltd. (5 from 42,485 patents)
5 patents:
1. D584703 - Television receiver
2. D563916 - Television receiver
3. D338293 - Electric vacuum cleaner
4. D315624 - Electric vacuum cleaner
5. D302878 - Electric vacuum cleaner