Average Co-Inventor Count = 1.42
ph-index = 7
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 Elektrowerke Kg (4 from 9 patents)
2. Vorwerk & Co Interholding Gmbh (3 from 340 patents)
3. Vorwerk Elektrowerke Stiftung & Co. Kg (2 from 4 patents)
9 patents:
1. 5867862 - Vacuum cleaning appliance with telescopic handle
2. D386843 - Vacuum cleaner
3. D384783 - Vacuum cleaner
4. 4749386 - Safety filter for a vacuum cleaner
5. D290418 - Carpet brush
6. D290419 - Carpet brush
7. D286334 - Vacuum cleaner
8. D286335 - Vacuum cleaner
9. 4309048 - Element for connecting an accessory instrument to a vacuum cleaner