Average Co-Inventor Count = 3.00
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. Canon Audio Limited (3 from 5 patents)
3 patents:
1. 5402502 - Sound output system
2. D356088 - Loudspeaker
3. D355914 - Loudspeaker