Average Co-Inventor Count = 6.86
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. Royal Appliance Mfg., Co. (2 from 234 patents)
2 patents:
1. D575013 - Hand held vacuum body
2. 7137169 - Vacuum cleaner with cleaning pad