Average Co-Inventor Count = 5.46
ph-index = 1
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. D'addario & Company, Inc. (2 from 43 patents)
2 patents:
1. 11854514 - Drumhead with reduced volume
2. 11189255 - Film formed snare and reduced volume snare drumhead