Average Co-Inventor Count = 2.00
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. National Union Electric Corporation (3 from 48 patents)
3 patents:
1. D313293 - Battery powered upright vacuum cleaner
2. D277038 - Transparent tool cover for suction cleaners or the like
3. D276944 - Portable vacuum cleaner