Average Co-Inventor Count = 1.20
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. Royal Sound Co., Inc. (3 from 5 patents)
3 patents:
1. D359494 - Bridge plate for speakers
2. D356089 - Speaker grill
3. 5346122 - Oval shaped box