Average Co-Inventor Count = 2.14
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 (4 from 342 patents)
2. Other (1 from 832,966 patents)
5 patents:
1. 5820643 - Dust filter bag for a vacuum cleaner
2. 4888850 - Vacuum cleaner nozzle arrangement
3. 4358165 - Holding device for supporting a turnable shaft
4. 4146283 - Vacuum cleaner head
5. 4134605 - Arrangement for connecting an attachment to a vacuum cleaning device