Average Co-Inventor Count = 3.64
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. D720845 - Facepiece
2. D678508 - Filter cartridge intake profile
3. D677780 - Filter cartridge
4. D677781 - Filter cartridge louver