Average Co-Inventor Count = 5.21
ph-index = 4
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. Polk Investment Corp. (3 from 10 patents)
2. Dei Headquarters, Inc. (2 from 23 patents)
3. Britannia Investment Corporation (1 from 15 patents)
6 patents:
1. D623170 - Subwoofer
2. D621385 - Speaker
3. 5730409 - Audio speaker with integral bracket
4. D357480 - Edge surround for speaker
5. D351839 - Speaker
6. D351388 - Combined speaker and integral stand