Average Co-Inventor Count = 4.48
ph-index = 5
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. The Hoover Comapny (5 from 429 patents)
5 patents:
1. 6138322 - Upright carpet and upholstery extractor
2. 5901406 - Liquid recovery tank for a carpet extractor
3. 5761763 - Upright carpet extractor
4. 5615448 - Convertible upright carpet extractor
5. 5493752 - Upright carpet and upholstery extractor