Average Co-Inventor Count = 2.67
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. Sennheiser Electronic Gmbh & Co Kg (2 from 296 patents)
2 patents:
1. 8638969 - Earphone, headset and ear pad
2. 8133073 - Headset and headset cable