Average Co-Inventor Count = 3.00
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. 3M Innovative Properties Company (4 from 14,087 patents)
4 patents:
1. D480476 - Filter cartridge for an escape hood
2. 6279572 - Protective system for face and respiratory protection
3. 6250299 - Protective system for face and respiratory protection
4. 6014971 - Protective system for face and respiratory protection