Average Co-Inventor Count = 2.68
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. Panasonic Corporation of North America (4 from 105 patents)
2. Matsushita Electric Corporation of America (1 from 139 patents)
5 patents:
1. 7219389 - Nozzle assembly housing for vacuum cleaner
2. 7185394 - Dirt cup assembly with attachable and detachable external filter holder
3. 7181804 - Removable dirt cup assembly with external filter
4. 7152275 - Dirt container for cyclonic vacuum cleaner
5. 6807708 - Upright vacuum cleaner with dual hoses and hose ports