Average Co-Inventor Count = 1.97
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. Vorwerk & Co Interholding Gmbh (3 from 340 patents)
2. Vorwerk Interholding Gmbh (1 from 1 patent)
4 patents:
1. 4961765 - Electrical vacuum cleaner and filter bag for same
2. 4851019 - Electric vacuum cleaner
3. 4302225 - Hand vacuum cleaner
4. 4190307 - Adapter