Average Co-Inventor Count = 5.46
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. Sennheiser Communications A/s (3 from 53 patents)
3 patents:
1. D857656 - Headset with adjustable contact pressure (ACP) including a spring system
2. 9788100 - Headphones with slidable lead element in earphone housings
3. D676970 - Hearing aid