Average Co-Inventor Count = 4.44
ph-index = 2
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. The Singing Machine Company Inc. (2 from 4 patents)
2 patents:
1. D509223 - Desktop home karaoke system
2. D505960 - Pedestal home karaoke system