Average Co-Inventor Count = 5.00
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. Doppler Labs, Inc. (1 from 24 patents)
2. Dopler Labs, Inc. (1 from 1 patent)
2 patents:
1. 9131308 - Passive audio ear filters with multiple filter elements
2. 9087506 - Passive acoustical filters incorporating inserts that reduce the speed of sound